--- /dev/null
+# This set of tests is not Perl-compatible. It checks on special features
+# of PCRE2's API, error diagnostics, and the compiled code of some patterns.
+# It also checks the non-Perl syntax that PCRE2 supports (Python, .NET,
+# Oniguruma). There are also some tests where PCRE2 and Perl differ,
+# either because PCRE2 can't be compatible, or there is a possible Perl
+# bug.
+
+# NOTE: This is a non-UTF set of tests. When UTF support is needed, use
+# test 5.
+
+#forbid_utf
+#newline_default lf any anycrlf
+
+# Test binary zeroes in the pattern
+
+# /a\0B/ where 0 is a binary zero
+/61 5c 00 62/B,hex
+------------------------------------------------------------------
+ Bra
+ a\x00b
+ Ket
+ End
+------------------------------------------------------------------
+ a\x{0}b
+ 0: a\x00b
+
+# /a0b/ where 0 is a binary zero
+/61 00 62/B,hex
+------------------------------------------------------------------
+ Bra
+ a\x00b
+ Ket
+ End
+------------------------------------------------------------------
+ a\x{0}b
+ 0: a\x00b
+
+# /(?#B0C)DE/ where 0 is a binary zero
+/28 3f 23 42 00 43 29 44 45/B,hex
+------------------------------------------------------------------
+ Bra
+ DE
+ Ket
+ End
+------------------------------------------------------------------
+ DE
+ 0: DE
+
+/(a)b|/I
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+
+/abc/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+ abc
+ 0: abc
+ defabc
+ 0: abc
+ abc\=anchored
+ 0: abc
+\= Expect no match
+ defabc\=anchored
+No match
+ ABC
+No match
+
+/^abc/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 3
+ abc
+ 0: abc
+ abc\=anchored
+ 0: abc
+\= Expect no match
+ defabc
+No match
+ defabc\=anchored
+No match
+
+/a+bc/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/a*bc/I
+Capturing subpattern count = 0
+Starting code units: a b
+Last code unit = 'c'
+Subject length lower bound = 2
+
+/a{3}bc/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 5
+
+/(abc|a+z)/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 2
+
+/^abc$/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 3
+ abc
+ 0: abc
+\= Expect no match
+ def\nabc
+No match
+
+/ab\idef/
+Failed: error 103 at offset 3: unrecognized character follows \
+
+/(?X)ab\idef/
+Failed: error 111 at offset 2: unrecognized character after (? or (?-
+
+/x{5,4}/
+Failed: error 104 at offset 5: numbers out of order in {} quantifier
+
+/z{65536}/
+Failed: error 105 at offset 7: number too big in {} quantifier
+
+/[abcd/
+Failed: error 106 at offset 5: missing terminating ] for character class
+
+/[\B]/B
+Failed: error 107 at offset 2: invalid escape sequence in character class
+
+/[\R]/B
+Failed: error 107 at offset 2: invalid escape sequence in character class
+
+/[\X]/B
+Failed: error 107 at offset 2: invalid escape sequence in character class
+
+/[z-a]/
+Failed: error 108 at offset 3: range out of order in character class
+
+/^*/
+Failed: error 109 at offset 1: quantifier does not follow a repeatable item
+
+/(abc/
+Failed: error 114 at offset 4: missing closing parenthesis
+
+/(?# abc/
+Failed: error 118 at offset 7: missing ) after (?# comment
+
+/(?z)abc/
+Failed: error 111 at offset 2: unrecognized character after (? or (?-
+
+/.*b/I
+Capturing subpattern count = 0
+First code unit at start or follows newline
+Last code unit = 'b'
+Subject length lower bound = 1
+
+/.*?b/I
+Capturing subpattern count = 0
+First code unit at start or follows newline
+Last code unit = 'b'
+Subject length lower bound = 1
+
+/cat|dog|elephant/I
+Capturing subpattern count = 0
+Starting code units: c d e
+Subject length lower bound = 3
+ this sentence eventually mentions a cat
+ 0: cat
+ this sentences rambles on and on for a while and then reaches elephant
+ 0: elephant
+
+/cat|dog|elephant/I
+Capturing subpattern count = 0
+Starting code units: c d e
+Subject length lower bound = 3
+ this sentence eventually mentions a cat
+ 0: cat
+ this sentences rambles on and on for a while and then reaches elephant
+ 0: elephant
+
+/cat|dog|elephant/Ii
+Capturing subpattern count = 0
+Options: caseless
+Starting code units: C D E c d e
+Subject length lower bound = 3
+ this sentence eventually mentions a CAT cat
+ 0: CAT
+ this sentences rambles on and on for a while to elephant ElePhant
+ 0: elephant
+
+/a|[bcd]/I
+Capturing subpattern count = 0
+Starting code units: a b c d
+Subject length lower bound = 1
+
+/(a|[^\dZ])/I
+Capturing subpattern count = 1
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = >
+ ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y [ \ ] ^ _ ` a b c d
+ e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80 \x81 \x82 \x83
+ \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92
+ \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1
+ \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0
+ \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf
+ \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce
+ \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd
+ \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec
+ \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb
+ \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+
+/(a|b)*[\s]/I
+Capturing subpattern count = 1
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20 a b
+Subject length lower bound = 1
+
+/(ab\2)/
+Failed: error 115 at offset 4: reference to non-existent subpattern
+
+/{4,5}abc/
+Failed: error 109 at offset 4: quantifier does not follow a repeatable item
+
+/(a)(b)(c)\2/I
+Capturing subpattern count = 3
+Max back reference = 2
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 4
+ abcb
+ 0: abcb
+ 1: a
+ 2: b
+ 3: c
+ abcb\=ovector=0
+ 0: abcb
+ 1: a
+ 2: b
+ 3: c
+ abcb\=ovector=1
+Matched, but too many substrings
+ 0: abcb
+ abcb\=ovector=2
+Matched, but too many substrings
+ 0: abcb
+ 1: a
+ abcb\=ovector=3
+Matched, but too many substrings
+ 0: abcb
+ 1: a
+ 2: b
+ abcb\=ovector=4
+ 0: abcb
+ 1: a
+ 2: b
+ 3: c
+
+/(a)bc|(a)(b)\2/I
+Capturing subpattern count = 3
+Max back reference = 2
+First code unit = 'a'
+Subject length lower bound = 3
+ abc
+ 0: abc
+ 1: a
+ abc\=ovector=0
+ 0: abc
+ 1: a
+ abc\=ovector=1
+Matched, but too many substrings
+ 0: abc
+ abc\=ovector=2
+ 0: abc
+ 1: a
+ aba
+ 0: aba
+ 1: <unset>
+ 2: a
+ 3: b
+ aba\=ovector=0
+ 0: aba
+ 1: <unset>
+ 2: a
+ 3: b
+ aba\=ovector=1
+Matched, but too many substrings
+ 0: aba
+ aba\=ovector=2
+Matched, but too many substrings
+ 0: aba
+ 1: <unset>
+ aba\=ovector=3
+Matched, but too many substrings
+ 0: aba
+ 1: <unset>
+ 2: a
+ aba\=ovector=4
+ 0: aba
+ 1: <unset>
+ 2: a
+ 3: b
+
+/abc$/I,dollar_endonly
+Capturing subpattern count = 0
+Options: dollar_endonly
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+ abc
+ 0: abc
+\= Expect no match
+ abc\n
+No match
+ abc\ndef
+No match
+
+/(a)(b)(c)(d)(e)\6/
+Failed: error 115 at offset 16: reference to non-existent subpattern
+
+/the quick brown fox/I
+Capturing subpattern count = 0
+First code unit = 't'
+Last code unit = 'x'
+Subject length lower bound = 19
+ the quick brown fox
+ 0: the quick brown fox
+ this is a line with the quick brown fox
+ 0: the quick brown fox
+
+/the quick brown fox/I,anchored
+Capturing subpattern count = 0
+Options: anchored
+First code unit = 't'
+Subject length lower bound = 19
+ the quick brown fox
+ 0: the quick brown fox
+\= Expect no match
+ this is a line with the quick brown fox
+No match
+
+/ab(?z)cd/
+Failed: error 111 at offset 4: unrecognized character after (? or (?-
+
+/^abc|def/I
+Capturing subpattern count = 0
+Starting code units: a d
+Subject length lower bound = 3
+ abcdef
+ 0: abc
+ abcdef\=notbol
+ 0: def
+
+/.*((abc)$|(def))/I
+Capturing subpattern count = 3
+First code unit at start or follows newline
+Subject length lower bound = 3
+ defabc
+ 0: defabc
+ 1: abc
+ 2: abc
+ defabc\=noteol
+ 0: def
+ 1: def
+ 2: <unset>
+ 3: def
+
+/)/
+Failed: error 122 at offset 0: unmatched closing parenthesis
+
+/a[]b/
+Failed: error 106 at offset 4: missing terminating ] for character class
+
+/[^aeiou ]{3,}/I
+Capturing subpattern count = 0
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6
+ 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [
+ \ ] ^ _ ` b c d f g h j k l m n p q r s t v w x y z { | } ~ \x7f \x80 \x81
+ \x82 \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90
+ \x91 \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f
+ \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae
+ \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd
+ \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc
+ \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb
+ \xdc \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea
+ \xeb \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9
+ \xfa \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 3
+ co-processors, and for
+ 0: -pr
+
+/<.*>/I
+Capturing subpattern count = 0
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 2
+ abc<def>ghi<klm>nop
+ 0: <def>ghi<klm>
+
+/<.*?>/I
+Capturing subpattern count = 0
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 2
+ abc<def>ghi<klm>nop
+ 0: <def>
+
+/<.*>/I,ungreedy
+Capturing subpattern count = 0
+Options: ungreedy
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 2
+ abc<def>ghi<klm>nop
+ 0: <def>
+
+/(?U)<.*>/I
+Capturing subpattern count = 0
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 2
+ abc<def>ghi<klm>nop
+ 0: <def>
+
+/<.*?>/I,ungreedy
+Capturing subpattern count = 0
+Options: ungreedy
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 2
+ abc<def>ghi<klm>nop
+ 0: <def>ghi<klm>
+
+/={3,}/I,ungreedy
+Capturing subpattern count = 0
+Options: ungreedy
+First code unit = '='
+Last code unit = '='
+Subject length lower bound = 3
+ abc========def
+ 0: ===
+
+/(?U)={3,}?/I
+Capturing subpattern count = 0
+First code unit = '='
+Last code unit = '='
+Subject length lower bound = 3
+ abc========def
+ 0: ========
+
+/(?<!bar|cattle)foo/I
+Capturing subpattern count = 0
+Max lookbehind = 6
+First code unit = 'f'
+Last code unit = 'o'
+Subject length lower bound = 3
+ foo
+ 0: foo
+ catfoo
+ 0: foo
+\= Expect no match
+ the barfoo
+No match
+ and cattlefoo
+No match
+
+/abc(?<=a+)b/
+Failed: error 125 at offset 3: lookbehind assertion is not fixed length
+
+/12345(?<=aaa|b{0,3})b/
+Failed: error 125 at offset 5: lookbehind assertion is not fixed length
+
+/(?<!(foo)a\1)bar/
+
+/(?i)abc/I
+Capturing subpattern count = 0
+First code unit = 'a' (caseless)
+Last code unit = 'c' (caseless)
+Subject length lower bound = 3
+
+/(a|(?m)a)/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/(?i)^1234/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = '1'
+Subject length lower bound = 4
+
+/(^b|(?i)^d)/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+Starting code units: D b d
+Subject length lower bound = 1
+
+/(?s).*/I
+Capturing subpattern count = 0
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+
+/[abcd]/I
+Capturing subpattern count = 0
+Starting code units: a b c d
+Subject length lower bound = 1
+
+/(?i)[abcd]/I
+Capturing subpattern count = 0
+Starting code units: A B C D a b c d
+Subject length lower bound = 1
+
+/(?m)[xy]|(b|c)/I
+Capturing subpattern count = 1
+Starting code units: b c x y
+Subject length lower bound = 1
+
+/(^a|^b)/Im
+Capturing subpattern count = 1
+Options: multiline
+First code unit at start or follows newline
+Subject length lower bound = 1
+
+/(?i)(^a|^b)/Im
+Capturing subpattern count = 1
+Options: multiline
+First code unit at start or follows newline
+Subject length lower bound = 1
+
+/(a)(?(1)a|b|c)/
+Failed: error 127 at offset 3: conditional group contains more than two branches
+
+/(?(?=a)a|b|c)/
+Failed: error 127 at offset 0: conditional group contains more than two branches
+
+/(?(1a)/
+Failed: error 124 at offset 4: missing closing parenthesis for condition
+
+/(?(1a))/
+Failed: error 124 at offset 4: missing closing parenthesis for condition
+
+/(?(?i))/
+Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
+
+/(?(abc))/
+Failed: error 115 at offset 3: reference to non-existent subpattern
+
+/(?(?<ab))/
+Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
+
+/((?s)blah)\s+\1/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'b'
+Last code unit = 'h'
+Subject length lower bound = 9
+
+/((?i)blah)\s+\1/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'b' (caseless)
+Last code unit = 'h' (caseless)
+Subject length lower bound = 9
+
+/((?i)b)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ /i b
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+First code unit = 'b' (caseless)
+Subject length lower bound = 1
+
+/(a*b|(?i:c*(?-i)d))/I
+Capturing subpattern count = 1
+Starting code units: C a b c d
+Subject length lower bound = 1
+
+/a$/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+ a
+ 0: a
+ a\n
+ 0: a
+\= Expect no match
+ a\=noteol
+No match
+ a\n\=noteol
+No match
+
+/a$/Im
+Capturing subpattern count = 0
+Options: multiline
+First code unit = 'a'
+Subject length lower bound = 1
+ a
+ 0: a
+ a\n
+ 0: a
+ a\n\=noteol
+ 0: a
+\= Expect no match
+ a\=noteol
+No match
+
+/\Aabc/Im
+Capturing subpattern count = 0
+Max lookbehind = 1
+Compile options: multiline
+Overall options: anchored multiline
+First code unit = 'a'
+Subject length lower bound = 3
+
+/^abc/Im
+Capturing subpattern count = 0
+Options: multiline
+First code unit at start or follows newline
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/I
+Capturing subpattern count = 5
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 3
+ aaaaabbbbbcccccdef
+ 0: aaaaabbbbbcccccdef
+ 1: aaaaabbbbbcccccdef
+ 2: aaaaa
+ 3: b
+ 4: bbbbccccc
+ 5: def
+
+/(?<=foo)[ab]/I
+Capturing subpattern count = 0
+Max lookbehind = 3
+Starting code units: a b
+Subject length lower bound = 1
+
+/(?<!foo)(alpha|omega)/I
+Capturing subpattern count = 1
+Max lookbehind = 3
+Starting code units: a o
+Last code unit = 'a'
+Subject length lower bound = 5
+
+/(?!alphabet)[ab]/I
+Capturing subpattern count = 0
+Starting code units: a b
+Subject length lower bound = 1
+
+/(?<=foo\n)^bar/Im
+Capturing subpattern count = 0
+Max lookbehind = 4
+Contains explicit CR or LF match
+Options: multiline
+Last code unit = 'r'
+Subject length lower bound = 3
+ foo\nbarbar
+ 0: bar
+\= Expect no match
+ rhubarb
+No match
+ barbell
+No match
+ abc\nbarton
+No match
+
+/^(?<=foo\n)bar/Im
+Capturing subpattern count = 0
+Max lookbehind = 4
+Contains explicit CR or LF match
+Options: multiline
+First code unit at start or follows newline
+Last code unit = 'r'
+Subject length lower bound = 3
+ foo\nbarbar
+ 0: bar
+\= Expect no match
+ rhubarb
+No match
+ barbell
+No match
+ abc\nbarton
+No match
+
+/(?>^abc)/Im
+Capturing subpattern count = 0
+Options: multiline
+First code unit at start or follows newline
+Last code unit = 'c'
+Subject length lower bound = 3
+ abc
+ 0: abc
+ def\nabc
+ 0: abc
+\= Expect no match
+ defabc
+No match
+
+/(?<=ab(c+)d)ef/
+Failed: error 125 at offset 0: lookbehind assertion is not fixed length
+
+/(?<=ab(?<=c+)d)ef/
+Failed: error 125 at offset 6: lookbehind assertion is not fixed length
+
+/(?<=ab(c|de)f)g/
+Failed: error 125 at offset 0: lookbehind assertion is not fixed length
+
+/The next three are in testinput2 because they have variable length branches/
+
+/(?<=bullock|donkey)-cart/I
+Capturing subpattern count = 0
+Max lookbehind = 7
+First code unit = '-'
+Last code unit = 't'
+Subject length lower bound = 5
+ the bullock-cart
+ 0: -cart
+ a donkey-cart race
+ 0: -cart
+\= Expect no match
+ cart
+No match
+ horse-and-cart
+No match
+
+/(?<=ab(?i)x|y|z)/I
+Capturing subpattern count = 0
+Max lookbehind = 3
+May match empty string
+Subject length lower bound = 0
+
+/(?>.*)(?<=(abcd)|(xyz))/I
+Capturing subpattern count = 2
+Max lookbehind = 4
+May match empty string
+Subject length lower bound = 0
+ alphabetabcd
+ 0: alphabetabcd
+ 1: abcd
+ endingxyz
+ 0: endingxyz
+ 1: <unset>
+ 2: xyz
+
+/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/I
+Capturing subpattern count = 0
+Max lookbehind = 4
+First code unit = 'Z'
+Last code unit = 'Z'
+Subject length lower bound = 2
+ abxyZZ
+ 0: ZZ
+ abXyZZ
+ 0: ZZ
+ ZZZ
+ 0: ZZ
+ zZZ
+ 0: ZZ
+ bZZ
+ 0: ZZ
+ BZZ
+ 0: ZZ
+\= Expect no match
+ ZZ
+No match
+ abXYZZ
+No match
+ zzz
+No match
+ bzz
+No match
+
+/(?<!(foo)a)bar/I
+Capturing subpattern count = 1
+Max lookbehind = 4
+First code unit = 'b'
+Last code unit = 'r'
+Subject length lower bound = 3
+ bar
+ 0: bar
+ foobbar
+ 0: bar
+\= Expect no match
+ fooabar
+No match
+
+# This one is here because Perl behaves differently; see also the following.
+
+/^(a\1?){4}$/I
+Capturing subpattern count = 1
+Max back reference = 1
+Compile options: <none>
+Overall options: anchored
+Starting code units: a
+Subject length lower bound = 4
+\= Expect no match
+ aaaa
+No match
+ aaaaaa
+No match
+
+# Perl does not fail these two for the final subjects. Neither did PCRE until
+# release 8.01. The problem is in backtracking into a subpattern that contains
+# a recursive reference to itself. PCRE has now made these into atomic patterns.
+
+/^(xa|=?\1a){2}$/
+ xa=xaa
+ 0: xa=xaa
+ 1: =xaa
+\= Expect no match
+ xa=xaaa
+No match
+
+/^(xa|=?\1a)+$/
+ xa=xaa
+ 0: xa=xaa
+ 1: =xaa
+\= Expect no match
+ xa=xaaa
+No match
+
+# These are syntax tests from Perl 5.005
+
+/a[b-a]/
+Failed: error 108 at offset 4: range out of order in character class
+
+/a[]b/
+Failed: error 106 at offset 4: missing terminating ] for character class
+
+/a[/
+Failed: error 106 at offset 2: missing terminating ] for character class
+
+/*a/
+Failed: error 109 at offset 0: quantifier does not follow a repeatable item
+
+/(*)b/
+Failed: error 109 at offset 1: quantifier does not follow a repeatable item
+
+/abc)/
+Failed: error 122 at offset 3: unmatched closing parenthesis
+
+/(abc/
+Failed: error 114 at offset 4: missing closing parenthesis
+
+/a**/
+Failed: error 109 at offset 2: quantifier does not follow a repeatable item
+
+/)(/
+Failed: error 122 at offset 0: unmatched closing parenthesis
+
+/\1/
+Failed: error 115 at offset 1: reference to non-existent subpattern
+
+/\2/
+Failed: error 115 at offset 1: reference to non-existent subpattern
+
+/(a)|\2/
+Failed: error 115 at offset 5: reference to non-existent subpattern
+
+/a[b-a]/Ii
+Failed: error 108 at offset 4: range out of order in character class
+
+/a[]b/Ii
+Failed: error 106 at offset 4: missing terminating ] for character class
+
+/a[/Ii
+Failed: error 106 at offset 2: missing terminating ] for character class
+
+/*a/Ii
+Failed: error 109 at offset 0: quantifier does not follow a repeatable item
+
+/(*)b/Ii
+Failed: error 109 at offset 1: quantifier does not follow a repeatable item
+
+/abc)/Ii
+Failed: error 122 at offset 3: unmatched closing parenthesis
+
+/(abc/Ii
+Failed: error 114 at offset 4: missing closing parenthesis
+
+/a**/Ii
+Failed: error 109 at offset 2: quantifier does not follow a repeatable item
+
+/)(/Ii
+Failed: error 122 at offset 0: unmatched closing parenthesis
+
+/:(?:/
+Failed: error 114 at offset 4: missing closing parenthesis
+
+/(?<%)b/
+Failed: error 162 at offset 3: subpattern name expected
+
+/a(?{)b/
+Failed: error 111 at offset 3: unrecognized character after (? or (?-
+
+/a(?{{})b/
+Failed: error 111 at offset 3: unrecognized character after (? or (?-
+
+/a(?{}})b/
+Failed: error 111 at offset 3: unrecognized character after (? or (?-
+
+/a(?{"{"})b/
+Failed: error 111 at offset 3: unrecognized character after (? or (?-
+
+/a(?{"{"}})b/
+Failed: error 111 at offset 3: unrecognized character after (? or (?-
+
+/(?(1?)a|b)/
+Failed: error 124 at offset 4: missing closing parenthesis for condition
+
+/[a[:xyz:/
+Failed: error 106 at offset 8: missing terminating ] for character class
+
+/(?<=x+)y/
+Failed: error 125 at offset 0: lookbehind assertion is not fixed length
+
+/a{37,17}/
+Failed: error 104 at offset 7: numbers out of order in {} quantifier
+
+/abc/\
+Failed: error 101 at offset 4: \ at end of pattern
+
+/abc/\i
+Failed: error 101 at offset 4: \ at end of pattern
+
+/(a)bc(d)/I
+Capturing subpattern count = 2
+First code unit = 'a'
+Last code unit = 'd'
+Subject length lower bound = 4
+ abcd
+ 0: abcd
+ 1: a
+ 2: d
+ abcd\=copy=2
+ 0: abcd
+ 1: a
+ 2: d
+ 2C d (1)
+ abcd\=copy=5
+ 0: abcd
+ 1: a
+ 2: d
+Copy substring 5 failed (-49): unknown substring
+
+/(.{20})/I
+Capturing subpattern count = 1
+Subject length lower bound = 20
+ abcdefghijklmnopqrstuvwxyz
+ 0: abcdefghijklmnopqrst
+ 1: abcdefghijklmnopqrst
+ abcdefghijklmnopqrstuvwxyz\=copy=1
+ 0: abcdefghijklmnopqrst
+ 1: abcdefghijklmnopqrst
+ 1C abcdefghijklmnopqrst (20)
+ abcdefghijklmnopqrstuvwxyz\=get=1
+ 0: abcdefghijklmnopqrst
+ 1: abcdefghijklmnopqrst
+ 1G abcdefghijklmnopqrst (20)
+
+/(.{15})/I
+Capturing subpattern count = 1
+Subject length lower bound = 15
+ abcdefghijklmnopqrstuvwxyz
+ 0: abcdefghijklmno
+ 1: abcdefghijklmno
+ abcdefghijklmnopqrstuvwxyz\=copy=1,get=1
+ 0: abcdefghijklmno
+ 1: abcdefghijklmno
+ 1C abcdefghijklmno (15)
+ 1G abcdefghijklmno (15)
+
+/(.{16})/I
+Capturing subpattern count = 1
+Subject length lower bound = 16
+ abcdefghijklmnopqrstuvwxyz
+ 0: abcdefghijklmnop
+ 1: abcdefghijklmnop
+ abcdefghijklmnopqrstuvwxyz\=copy=1,get=1,getall
+ 0: abcdefghijklmnop
+ 1: abcdefghijklmnop
+ 1C abcdefghijklmnop (16)
+ 1G abcdefghijklmnop (16)
+ 0L abcdefghijklmnop
+ 1L abcdefghijklmnop
+
+/^(a|(bc))de(f)/I
+Capturing subpattern count = 3
+Compile options: <none>
+Overall options: anchored
+Starting code units: a b
+Subject length lower bound = 4
+ adef\=get=1,get=2,get=3,get=4,getall
+ 0: adef
+ 1: a
+ 2: <unset>
+ 3: f
+ 1G a (1)
+Get substring 2 failed (-55): requested value is not set
+ 3G f (1)
+Get substring 4 failed (-49): unknown substring
+ 0L adef
+ 1L a
+ 2L
+ 3L f
+ bcdef\=get=1,get=2,get=3,get=4,getall
+ 0: bcdef
+ 1: bc
+ 2: bc
+ 3: f
+ 1G bc (2)
+ 2G bc (2)
+ 3G f (1)
+Get substring 4 failed (-49): unknown substring
+ 0L bcdef
+ 1L bc
+ 2L bc
+ 3L f
+ adefghijk\=copy=0
+ 0: adef
+ 1: a
+ 2: <unset>
+ 3: f
+ 0C adef (4)
+
+/^abc\00def/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 7
+ abc\00def\=copy=0,getall
+ 0: abc\x00def
+ 0C abc\x00def (7)
+ 0L abc\x00def
+
+/word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
+)((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
+)?)?)?)?)?)?)?)?)?otherword/I
+Capturing subpattern count = 8
+Contains explicit CR or LF match
+First code unit = 'w'
+Last code unit = 'd'
+Subject length lower bound = 14
+
+/.*X/IB
+------------------------------------------------------------------
+ Bra
+ Any*
+ X
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit at start or follows newline
+Last code unit = 'X'
+Subject length lower bound = 1
+
+/.*X/IBs
+------------------------------------------------------------------
+ Bra
+ AllAny*
+ X
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: dotall
+Overall options: anchored dotall
+Last code unit = 'X'
+Subject length lower bound = 1
+
+/(.*X|^B)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ Any*
+ X
+ Alt
+ ^
+ B
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+First code unit at start or follows newline
+Subject length lower bound = 1
+
+/(.*X|^B)/IBs
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ AllAny*
+ X
+ Alt
+ ^
+ B
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Compile options: dotall
+Overall options: anchored dotall
+Subject length lower bound = 1
+
+/(?s)(.*X|^B)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ AllAny*
+ X
+ Alt
+ ^
+ B
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 1
+
+/(?s:.*X|^B)/IB
+------------------------------------------------------------------
+ Bra
+ Bra
+ AllAny*
+ X
+ Alt
+ ^
+ B
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 1
+
+/\Biss\B/I,aftertext
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = 'i'
+Last code unit = 's'
+Subject length lower bound = 3
+ Mississippi
+ 0: iss
+ 0+ issippi
+
+/iss/I,aftertext,altglobal
+Capturing subpattern count = 0
+First code unit = 'i'
+Last code unit = 's'
+Subject length lower bound = 3
+ Mississippi
+ 0: iss
+ 0+ issippi
+ 0: iss
+ 0+ ippi
+
+/\Biss\B/I,aftertext,altglobal
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = 'i'
+Last code unit = 's'
+Subject length lower bound = 3
+ Mississippi
+ 0: iss
+ 0+ issippi
+
+/\Biss\B/Ig,aftertext
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = 'i'
+Last code unit = 's'
+Subject length lower bound = 3
+ Mississippi
+ 0: iss
+ 0+ issippi
+ 0: iss
+ 0+ ippi
+\= Expect no match
+ Mississippi\=anchored
+No match
+
+/(?<=[Ms])iss/Ig,aftertext
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = 'i'
+Last code unit = 's'
+Subject length lower bound = 3
+ Mississippi
+ 0: iss
+ 0+ issippi
+ 0: iss
+ 0+ ippi
+
+/(?<=[Ms])iss/I,aftertext,altglobal
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = 'i'
+Last code unit = 's'
+Subject length lower bound = 3
+ Mississippi
+ 0: iss
+ 0+ issippi
+
+/^iss/Ig,aftertext
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'i'
+Subject length lower bound = 3
+ ississippi
+ 0: iss
+ 0+ issippi
+
+/.*iss/Ig,aftertext
+Capturing subpattern count = 0
+First code unit at start or follows newline
+Last code unit = 's'
+Subject length lower bound = 3
+ abciss\nxyzisspqr
+ 0: abciss
+ 0+ \x0axyzisspqr
+ 0: xyziss
+ 0+ pqr
+
+/.i./Ig,aftertext
+Capturing subpattern count = 0
+Last code unit = 'i'
+Subject length lower bound = 3
+ Mississippi
+ 0: Mis
+ 0+ sissippi
+ 0: sis
+ 0+ sippi
+ 0: sip
+ 0+ pi
+ Mississippi\=anchored
+ 0: Mis
+ 0+ sissippi
+ 0: sis
+ 0+ sippi
+ 0: sip
+ 0+ pi
+ Missouri river
+ 0: Mis
+ 0+ souri river
+ 0: ri
+ 0+ river
+ 0: riv
+ 0+ er
+ Missouri river\=anchored
+ 0: Mis
+ 0+ souri river
+
+/^.is/Ig,aftertext
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 3
+ Mississippi
+ 0: Mis
+ 0+ sissippi
+
+/^ab\n/Ig,aftertext
+Capturing subpattern count = 0
+Contains explicit CR or LF match
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 3
+ ab\nab\ncd
+ 0: ab\x0a
+ 0+ ab\x0acd
+
+/^ab\n/Igm,aftertext
+Capturing subpattern count = 0
+Contains explicit CR or LF match
+Options: multiline
+First code unit at start or follows newline
+Last code unit = \x0a
+Subject length lower bound = 3
+ ab\nab\ncd
+ 0: ab\x0a
+ 0+ ab\x0acd
+ 0: ab\x0a
+ 0+ cd
+
+/^/gm,newline=any
+ a\rb\nc\r\nxyz\=aftertext
+ 0:
+ 0+ a\x0db\x0ac\x0d\x0axyz
+ 0:
+ 0+ b\x0ac\x0d\x0axyz
+ 0:
+ 0+ c\x0d\x0axyz
+ 0:
+ 0+ xyz
+
+/abc/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/abc|bac/I
+Capturing subpattern count = 0
+Starting code units: a b
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/(abc|bac)/I
+Capturing subpattern count = 1
+Starting code units: a b
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/(abc|(c|dc))/I
+Capturing subpattern count = 2
+Starting code units: a c d
+Last code unit = 'c'
+Subject length lower bound = 1
+
+/(abc|(d|de)c)/I
+Capturing subpattern count = 2
+Starting code units: a d
+Last code unit = 'c'
+Subject length lower bound = 2
+
+/a*/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+
+/a+/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+
+/(baa|a+)/I
+Capturing subpattern count = 1
+Starting code units: a b
+Last code unit = 'a'
+Subject length lower bound = 1
+
+/a{0,3}/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+
+/baa{3,}/I
+Capturing subpattern count = 0
+First code unit = 'b'
+Last code unit = 'a'
+Subject length lower bound = 5
+
+/"([^\\"]+|\\.)*"/I
+Capturing subpattern count = 1
+First code unit = '"'
+Last code unit = '"'
+Subject length lower bound = 2
+
+/(abc|ab[cd])/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 3
+
+/(a|.)/I
+Capturing subpattern count = 1
+Subject length lower bound = 1
+
+/a|ba|\w/I
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P
+ Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+
+/abc(?=pqr)/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'r'
+Subject length lower bound = 3
+
+/...(?<=abc)/I
+Capturing subpattern count = 0
+Max lookbehind = 3
+Subject length lower bound = 3
+
+/abc(?!pqr)/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/ab./I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+
+/ab[xyz]/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+
+/abc*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/ab.c*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+
+/a.c*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 2
+
+/.c*/I
+Capturing subpattern count = 0
+Subject length lower bound = 1
+
+/ac*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+
+/(a.c*|b.c*)/I
+Capturing subpattern count = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/a.c*|aba/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 2
+
+/.+a/I
+Capturing subpattern count = 0
+Last code unit = 'a'
+Subject length lower bound = 2
+
+/(?=abcda)a.*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'a'
+Subject length lower bound = 1
+
+/(?=a)a.*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+
+/a(b)*/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/a\d*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+
+/ab\d*/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/a(\d)*/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/abcde{0,0}/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'd'
+Subject length lower bound = 4
+
+/ab\d+/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+
+/a(?(1)b)(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Subject length lower bound = 2
+
+/a(?(1)bag|big)(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Last code unit = 'g'
+Subject length lower bound = 5
+
+/a(?(1)bag|big)*(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Subject length lower bound = 2
+
+/a(?(1)bag|big)+(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Last code unit = 'g'
+Subject length lower bound = 5
+
+/a(?(1)b..|b..)(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 5
+
+/ab\d{0}e/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'e'
+Subject length lower bound = 3
+
+/a?b?/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ a
+ 0: a
+ b
+ 0: b
+ ab
+ 0: ab
+ \
+ 0:
+\= Expect no match
+ \=notempty
+No match
+
+/|-/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ abcd
+ 0:
+ -abc
+ 0:
+ ab-c\=notempty
+ 0: -
+\= Expect no match
+ abc\=notempty
+No match
+
+/^.?abcd/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Last code unit = 'd'
+Subject length lower bound = 4
+
+/\( # ( at start
+ (?: # Non-capturing bracket
+ (?>[^()]+) # Either a sequence of non-brackets (no backtracking)
+ | # Or
+ (?R) # Recurse - i.e. nested bracketed string
+ )* # Zero or more contents
+ \) # Closing )
+ /Ix
+Capturing subpattern count = 0
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (abcd)
+ 0: (abcd)
+ (abcd)xyz
+ 0: (abcd)
+ xyz(abcd)
+ 0: (abcd)
+ (ab(xy)cd)pqr
+ 0: (ab(xy)cd)
+ (ab(xycd)pqr
+ 0: (xycd)
+ () abc ()
+ 0: ()
+ 12(abcde(fsh)xyz(foo(bar))lmno)89
+ 0: (abcde(fsh)xyz(foo(bar))lmno)
+\= Expect no match
+ abcd
+No match
+ abcd)
+No match
+ (abcd
+No match
+
+/\( ( (?>[^()]+) | (?R) )* \) /Igx
+Capturing subpattern count = 1
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (ab(xy)cd)pqr
+ 0: (ab(xy)cd)
+ 1: cd
+ 1(abcd)(x(y)z)pqr
+ 0: (abcd)
+ 1: abcd
+ 0: (x(y)z)
+ 1: z
+
+/\( (?: (?>[^()]+) | (?R) ) \) /Ix
+Capturing subpattern count = 0
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 3
+ (abcd)
+ 0: (abcd)
+ (ab(xy)cd)
+ 0: (xy)
+ (a(b(c)d)e)
+ 0: (c)
+ ((ab))
+ 0: ((ab))
+\= Expect no match
+ ()
+No match
+
+/\( (?: (?>[^()]+) | (?R) )? \) /Ix
+Capturing subpattern count = 0
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ ()
+ 0: ()
+ 12(abcde(fsh)xyz(foo(bar))lmno)89
+ 0: (fsh)
+
+/\( ( (?>[^()]+) | (?R) )* \) /Ix
+Capturing subpattern count = 1
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: cd
+
+/\( ( ( (?>[^()]+) | (?R) )* ) \) /Ix
+Capturing subpattern count = 2
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: ab(xy)cd
+ 2: cd
+
+/\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /Ix
+Capturing subpattern count = 3
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: <unset>
+ 2: ab(xy)cd
+ 3: cd
+ (123ab(xy)cd)
+ 0: (123ab(xy)cd)
+ 1: 123
+ 2: ab(xy)cd
+ 3: cd
+
+/\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /Ix
+Capturing subpattern count = 3
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: ab(xy)cd
+ 2: <unset>
+ 3: cd
+ (123ab(xy)cd)
+ 0: (123ab(xy)cd)
+ 1: 123ab(xy)cd
+ 2: 123
+ 3: cd
+
+/\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /Ix
+Capturing subpattern count = 11
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: ab(xy)cd
+ 2: ab(xy)cd
+ 3: ab(xy)cd
+ 4: ab(xy)cd
+ 5: ab(xy)cd
+ 6: ab(xy)cd
+ 7: ab(xy)cd
+ 8: ab(xy)cd
+ 9: ab(xy)cd
+10: ab(xy)cd
+11: cd
+
+/\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /Ix
+Capturing subpattern count = 3
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (abcd(xyz<p>qrs)123)
+ 0: (abcd(xyz<p>qrs)123)
+ 1: abcd(xyz<p>qrs)123
+ 2: 123
+
+/\( ( ( (?>[^()]+) | ((?R)) )* ) \) /Ix
+Capturing subpattern count = 3
+Options: extended
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 2
+ (ab(cd)ef)
+ 0: (ab(cd)ef)
+ 1: ab(cd)ef
+ 2: ef
+ 3: (cd)
+ (ab(cd(ef)gh)ij)
+ 0: (ab(cd(ef)gh)ij)
+ 1: ab(cd(ef)gh)ij
+ 2: ij
+ 3: (cd(ef)gh)
+
+/^[[:alnum:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [0-9A-Za-z]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P
+ Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+
+/^[[:^alnum:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x00-/:-@[-`{-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = >
+ ? @ [ \ ] ^ _ ` { | } ~ \x7f \x80 \x81 \x82 \x83 \x84 \x85 \x86 \x87 \x88
+ \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92 \x93 \x94 \x95 \x96 \x97
+ \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6
+ \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5
+ \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4
+ \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3
+ \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd \xde \xdf \xe0 \xe1 \xe2
+ \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec \xed \xee \xef \xf0 \xf1
+ \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+
+/^[[:alpha:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [A-Za-z]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+
+/^[[:^alpha:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x00-@[-`{-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4
+ 5 6 7 8 9 : ; < = > ? @ [ \ ] ^ _ ` { | } ~ \x7f \x80 \x81 \x82 \x83 \x84
+ \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92 \x93
+ \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1 \xa2
+ \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0 \xb1
+ \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf \xc0
+ \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce \xcf
+ \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd \xde
+ \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec \xed
+ \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb \xfc
+ \xfd \xfe \xff
+Subject length lower bound = 1
+
+/[_[:alpha:]]/I
+Capturing subpattern count = 0
+Starting code units: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+ _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+
+/^[[:ascii:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x00-\x7f]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4
+ 5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y
+ Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~
+ \x7f
+Subject length lower bound = 1
+
+/^[[:^ascii:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x80-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x80 \x81 \x82 \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a
+ \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99
+ \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8
+ \xa9 \xaa \xab \xac \xad \xae \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7
+ \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6
+ \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5
+ \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4
+ \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3
+ \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+
+/^[[:blank:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x09 ]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x09 \x20
+Subject length lower bound = 1
+
+/^[[:^blank:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x00-\x08\x0a-\x1f!-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x0a \x0b
+ \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1a
+ \x1b \x1c \x1d \x1e \x1f ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9
+ : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^
+ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80
+ \x81 \x82 \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f
+ \x90 \x91 \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e
+ \x9f \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad
+ \xae \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc
+ \xbd \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb
+ \xcc \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda
+ \xdb \xdc \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9
+ \xea \xeb \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8
+ \xf9 \xfa \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+
+/[\n\x0b\x0c\x0d[:blank:]]/I
+Capturing subpattern count = 0
+Contains explicit CR or LF match
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
+Subject length lower bound = 1
+
+/^[[:cntrl:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x00-\x1f\x7f]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f \x7f
+Subject length lower bound = 1
+
+/^[[:digit:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [0-9]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Subject length lower bound = 1
+
+/^[[:graph:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [!-~]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 :
+ ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _
+ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~
+Subject length lower bound = 1
+
+/^[[:lower:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [a-z]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+
+/^[[:print:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [ -~]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x20 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8
+ 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ]
+ ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~
+Subject length lower bound = 1
+
+/^[[:punct:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [!-/:-@[-`{-~]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^
+ _ ` { | } ~
+Subject length lower bound = 1
+
+/^[[:space:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x09-\x0d ]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
+Subject length lower bound = 1
+
+/^[[:upper:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [A-Z]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+Subject length lower bound = 1
+
+/^[[:xdigit:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [0-9A-Fa-f]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f
+Subject length lower bound = 1
+
+/^[[:word:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [0-9A-Z_a-z]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P
+ Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+
+/^[[:^cntrl:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [ -~\x80-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x20 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8
+ 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ]
+ ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x80 \x81
+ \x82 \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90
+ \x91 \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f
+ \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae
+ \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd
+ \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc
+ \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb
+ \xdc \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea
+ \xeb \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9
+ \xfa \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+
+/^[12[:^digit:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x00-/12:-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / 1 2 : ; <
+ = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ ` a
+ b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80 \x81 \x82
+ \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91
+ \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0
+ \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf
+ \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe
+ \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd
+ \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc
+ \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb
+ \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa
+ \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+
+/^[[:^blank:]]/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ [\x00-\x08\x0a-\x1f!-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x0a \x0b
+ \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1a
+ \x1b \x1c \x1d \x1e \x1f ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9
+ : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^
+ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80
+ \x81 \x82 \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f
+ \x90 \x91 \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e
+ \x9f \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad
+ \xae \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc
+ \xbd \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb
+ \xcc \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda
+ \xdb \xdc \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9
+ \xea \xeb \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8
+ \xf9 \xfa \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+
+/[01[:alpha:]%]/IB
+------------------------------------------------------------------
+ Bra
+ [%01A-Za-z]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: % 0 1 A B C D E F G H I J K L M N O P Q R S T U V W
+ X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+
+/[[.ch.]]/I
+Failed: error 113 at offset 1: POSIX collating elements are not supported
+
+/[[=ch=]]/I
+Failed: error 113 at offset 1: POSIX collating elements are not supported
+
+/[[:rhubarb:]]/I
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[[:upper:]]/Ii
+Capturing subpattern count = 0
+Options: caseless
+Starting code units: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+ A
+ 0: A
+ a
+ 0: a
+
+/[[:lower:]]/Ii
+Capturing subpattern count = 0
+Options: caseless
+Starting code units: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+ A
+ 0: A
+ a
+ 0: a
+
+/((?-i)[[:lower:]])[[:lower:]]/Ii
+Capturing subpattern count = 1
+Options: caseless
+Starting code units: a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 2
+ ab
+ 0: ab
+ 1: a
+ aB
+ 0: aB
+ 1: a
+\= Expect no match
+ Ab
+No match
+ AB
+No match
+
+/[\200-\110]/I
+Failed: error 108 at offset 9: range out of order in character class
+
+/^(?(0)f|b)oo/I
+Failed: error 115 at offset 5: reference to non-existent subpattern
+
+# This one's here because of the large output vector needed
+
+/(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/I
+Capturing subpattern count = 271
+Max back reference = 270
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Subject length lower bound = 0
+ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC\=ovector=300
+ 0: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
+ 1: 1
+ 2: 2
+ 3: 3
+ 4: 4
+ 5: 5
+ 6: 6
+ 7: 7
+ 8: 8
+ 9: 9
+10: 10
+11: 11
+12: 12
+13: 13
+14: 14
+15: 15
+16: 16
+17: 17
+18: 18
+19: 19
+20: 20
+21: 21
+22: 22
+23: 23
+24: 24
+25: 25
+26: 26
+27: 27
+28: 28
+29: 29
+30: 30
+31: 31
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+33: 33
+34: 34
+35: 35
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+48: 48
+49: 49
+50: 50
+51: 51
+52: 52
+53: 53
+54: 54
+55: 55
+56: 56
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+58: 58
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+60: 60
+61: 61
+62: 62
+63: 63
+64: 64
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+66: 66
+67: 67
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+71: 71
+72: 72
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+76: 76
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+78: 78
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+80: 80
+81: 81
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+85: 85
+86: 86
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+90: 90
+91: 91
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+111: 111
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+113: 113
+114: 114
+115: 115
+116: 116
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+118: 118
+119: 119
+120: 120
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+122: 122
+123: 123
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+125: 125
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+127: 127
+128: 128
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+130: 130
+131: 131
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+133: 133
+134: 134
+135: 135
+136: 136
+137: 137
+138: 138
+139: 139
+140: 140
+141: 141
+142: 142
+143: 143
+144: 144
+145: 145
+146: 146
+147: 147
+148: 148
+149: 149
+150: 150
+151: 151
+152: 152
+153: 153
+154: 154
+155: 155
+156: 156
+157: 157
+158: 158
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+160: 160
+161: 161
+162: 162
+163: 163
+164: 164
+165: 165
+166: 166
+167: 167
+168: 168
+169: 169
+170: 170
+171: 171
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+173: 173
+174: 174
+175: 175
+176: 176
+177: 177
+178: 178
+179: 179
+180: 180
+181: 181
+182: 182
+183: 183
+184: 184
+185: 185
+186: 186
+187: 187
+188: 188
+189: 189
+190: 190
+191: 191
+192: 192
+193: 193
+194: 194
+195: 195
+196: 196
+197: 197
+198: 198
+199: 199
+200: 200
+201: 201
+202: 202
+203: 203
+204: 204
+205: 205
+206: 206
+207: 207
+208: 208
+209: 209
+210: 210
+211: 211
+212: 212
+213: 213
+214: 214
+215: 215
+216: 216
+217: 217
+218: 218
+219: 219
+220: 220
+221: 221
+222: 222
+223: 223
+224: 224
+225: 225
+226: 226
+227: 227
+228: 228
+229: 229
+230: 230
+231: 231
+232: 232
+233: 233
+234: 234
+235: 235
+236: 236
+237: 237
+238: 238
+239: 239
+240: 240
+241: 241
+242: 242
+243: 243
+244: 244
+245: 245
+246: 246
+247: 247
+248: 248
+249: 249
+250: 250
+251: 251
+252: 252
+253: 253
+254: 254
+255: 255
+256: 256
+257: 257
+258: 258
+259: 259
+260: 260
+261: 261
+262: 262
+263: 263
+264: 264
+265: 265
+266: 266
+267: 267
+268: 268
+269: 269
+270: ABC
+271: ABC
+
+# This one's here because Perl does this differently and PCRE2 can't at present
+
+/(main(O)?)+/I
+Capturing subpattern count = 2
+First code unit = 'm'
+Last code unit = 'n'
+Subject length lower bound = 4
+ mainmain
+ 0: mainmain
+ 1: main
+ mainOmain
+ 0: mainOmain
+ 1: main
+ 2: O
+
+# These are all cases where Perl does it differently (nested captures)
+
+/^(a(b)?)+$/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 1
+ aba
+ 0: aba
+ 1: a
+ 2: b
+
+/^(aa(bb)?)+$/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: aa
+ 2: bb
+
+/^(aa|aa(bb))+$/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: aa
+ 2: bb
+
+/^(aa(bb)??)+$/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: aa
+ 2: bb
+
+/^(?:aa(bb)?)+$/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: bb
+
+/^(aa(b(b))?)+$/I
+Capturing subpattern count = 3
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: aa
+ 2: bb
+ 3: b
+
+/^(?:aa(b(b))?)+$/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: bb
+ 2: b
+
+/^(?:aa(b(?:b))?)+$/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: bb
+
+/^(?:aa(bb(?:b))?)+$/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbbaa
+ 0: aabbbaa
+ 1: bbb
+
+/^(?:aa(b(?:bb))?)+$/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbbaa
+ 0: aabbbaa
+ 1: bbb
+
+/^(?:aa(?:b(b))?)+$/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbaa
+ 0: aabbaa
+ 1: b
+
+/^(?:aa(?:b(bb))?)+$/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbbaa
+ 0: aabbbaa
+ 1: bb
+
+/^(aa(b(bb))?)+$/I
+Capturing subpattern count = 3
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbbaa
+ 0: aabbbaa
+ 1: aa
+ 2: bbb
+ 3: bb
+
+/^(aa(bb(bb))?)+$/I
+Capturing subpattern count = 3
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+ aabbbbaa
+ 0: aabbbbaa
+ 1: aa
+ 2: bbbb
+ 3: bb
+
+# ----------------
+
+/#/IBx
+------------------------------------------------------------------
+ Bra
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+May match empty string
+Options: extended
+Subject length lower bound = 0
+
+/a#/IBx
+------------------------------------------------------------------
+ Bra
+ a
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: extended
+First code unit = 'a'
+Subject length lower bound = 1
+
+/[\s]/IB
+------------------------------------------------------------------
+ Bra
+ [\x09-\x0d ]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
+Subject length lower bound = 1
+
+/[\S]/IB
+------------------------------------------------------------------
+ Bra
+ [\x00-\x08\x0e-\x1f!-\xff] (neg)
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x0e \x0f
+ \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1a \x1b \x1c \x1d \x1e
+ \x1f ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? @ A B C
+ D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ ` a b c d e f g h
+ i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80 \x81 \x82 \x83 \x84
+ \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92 \x93
+ \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1 \xa2
+ \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0 \xb1
+ \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf \xc0
+ \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce \xcf
+ \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd \xde
+ \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec \xed
+ \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb \xfc
+ \xfd \xfe \xff
+Subject length lower bound = 1
+
+/a(?i)b/IB
+------------------------------------------------------------------
+ Bra
+ a
+ /i b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b' (caseless)
+Subject length lower bound = 2
+ ab
+ 0: ab
+ aB
+ 0: aB
+\= Expect no match
+ AB
+No match
+
+/(a(?i)b)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ a
+ /i b
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'b' (caseless)
+Subject length lower bound = 2
+ ab
+ 0: ab
+ 1: ab
+ aB
+ 0: aB
+ 1: aB
+\= Expect no match
+ AB
+No match
+
+/ (?i)abc/IBx
+------------------------------------------------------------------
+ Bra
+ /i abc
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: extended
+First code unit = 'a' (caseless)
+Last code unit = 'c' (caseless)
+Subject length lower bound = 3
+
+/#this is a comment
+ (?i)abc/IBx
+------------------------------------------------------------------
+ Bra
+ /i abc
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: extended
+First code unit = 'a' (caseless)
+Last code unit = 'c' (caseless)
+Subject length lower bound = 3
+
+/123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
+------------------------------------------------------------------
+ Bra
+ 123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = '1'
+Last code unit = '0'
+Subject length lower bound = 300
+
+/\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
+------------------------------------------------------------------
+ Bra
+ 123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = '1'
+Last code unit = '0'
+Subject length lower bound = 300
+
+/\Q\E/IB
+------------------------------------------------------------------
+ Bra
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ \
+ 0:
+
+/\Q\Ex/IB
+------------------------------------------------------------------
+ Bra
+ x
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'x'
+Subject length lower bound = 1
+
+/ \Q\E/IB
+------------------------------------------------------------------
+ Bra
+
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = ' '
+Subject length lower bound = 1
+
+/a\Q\E/IB
+------------------------------------------------------------------
+ Bra
+ a
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+ abc
+ 0: a
+ bca
+ 0: a
+ bac
+ 0: a
+
+/a\Q\Eb/IB
+------------------------------------------------------------------
+ Bra
+ ab
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ abc
+ 0: ab
+
+/\Q\Eabc/IB
+------------------------------------------------------------------
+ Bra
+ abc
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/x*+\w/IB
+------------------------------------------------------------------
+ Bra
+ x*+
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P
+ Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Subject length lower bound = 1
+\= Expect no match
+ xxxxx
+No match
+
+/x?+/IB
+------------------------------------------------------------------
+ Bra
+ x?+
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+
+/x++/IB
+------------------------------------------------------------------
+ Bra
+ x++
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'x'
+Subject length lower bound = 1
+
+/x{1,3}+/B,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ x
+ x{0,2}+
+ Ket
+ End
+------------------------------------------------------------------
+
+/x{1,3}+/Bi,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ /i x
+ /i x{0,2}+
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^x]{1,3}+/B,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ [^x]
+ [^x]{0,2}+
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^x]{1,3}+/Bi,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ /i [^x]
+ /i [^x]{0,2}+
+ Ket
+ End
+------------------------------------------------------------------
+
+/(x)*+/IB
+------------------------------------------------------------------
+ Bra
+ Braposzero
+ CBraPos 1
+ x
+ KetRpos
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+
+/^(\w++|\s++)*$/I
+Capturing subpattern count = 1
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+ now is the time for all good men to come to the aid of the party
+ 0: now is the time for all good men to come to the aid of the party
+ 1: party
+\= Expect no match
+ this is not a line with only words and spaces!
+No match
+
+/(\d++)(\w)/I
+Capturing subpattern count = 2
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Subject length lower bound = 2
+ 12345a
+ 0: 12345a
+ 1: 12345
+ 2: a
+\= Expect no match
+ 12345+
+No match
+
+/a++b/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ aaab
+ 0: aaab
+
+/(a++b)/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ aaab
+ 0: aaab
+ 1: aaab
+
+/(a++)b/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ aaab
+ 0: aaab
+ 1: aaa
+
+/([^()]++|\([^()]*\))+/I
+Capturing subpattern count = 1
+Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
+ \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( * + , - . / 0 1 2 3 4 5
+ 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+ [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f
+ \x80 \x81 \x82 \x83 \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e
+ \x8f \x90 \x91 \x92 \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d
+ \x9e \x9f \xa0 \xa1 \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac
+ \xad \xae \xaf \xb0 \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb
+ \xbc \xbd \xbe \xbf \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca
+ \xcb \xcc \xcd \xce \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9
+ \xda \xdb \xdc \xdd \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8
+ \xe9 \xea \xeb \xec \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7
+ \xf8 \xf9 \xfa \xfb \xfc \xfd \xfe \xff
+Subject length lower bound = 1
+ ((abc(ade)ufh()()x
+ 0: abc(ade)ufh()()x
+ 1: x
+
+/\(([^()]++|\([^()]+\))+\)/I
+Capturing subpattern count = 1
+First code unit = '('
+Last code unit = ')'
+Subject length lower bound = 3
+ (abc)
+ 0: (abc)
+ 1: abc
+ (abc(def)xyz)
+ 0: (abc(def)xyz)
+ 1: xyz
+\= Expect no match
+ ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+No match
+
+/(abc){1,3}+/IB
+------------------------------------------------------------------
+ Bra
+ Once
+ CBra 1
+ abc
+ Ket
+ Brazero
+ Bra
+ CBra 1
+ abc
+ Ket
+ Brazero
+ CBra 1
+ abc
+ Ket
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/a+?+/I
+Failed: error 109 at offset 3: quantifier does not follow a repeatable item
+
+/a{2,3}?+b/I
+Failed: error 109 at offset 7: quantifier does not follow a repeatable item
+
+/(?U)a+?+/I
+Failed: error 109 at offset 7: quantifier does not follow a repeatable item
+
+/a{2,3}?+b/I,ungreedy
+Failed: error 109 at offset 7: quantifier does not follow a repeatable item
+
+/x(?U)a++b/IB
+------------------------------------------------------------------
+ Bra
+ x
+ a++
+ b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'x'
+Last code unit = 'b'
+Subject length lower bound = 3
+ xaaaab
+ 0: xaaaab
+
+/(?U)xa++b/IB
+------------------------------------------------------------------
+ Bra
+ x
+ a++
+ b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'x'
+Last code unit = 'b'
+Subject length lower bound = 3
+ xaaaab
+ 0: xaaaab
+
+/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ CBra 1
+ CBra 2
+ a+
+ Ket
+ CBra 3
+ [ab]+?
+ Ket
+ CBra 4
+ [bc]+
+ Ket
+ CBra 5
+ \w*+
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 5
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 3
+
+/^x(?U)a+b/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ x
+ a++
+ b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'x'
+Last code unit = 'b'
+Subject length lower bound = 3
+
+/^x(?U)(a+)b/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ x
+ CBra 1
+ a+?
+ Ket
+ b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'x'
+Last code unit = 'b'
+Subject length lower bound = 3
+
+/[.x.]/I
+Failed: error 113 at offset 0: POSIX collating elements are not supported
+
+/[=x=]/I
+Failed: error 113 at offset 0: POSIX collating elements are not supported
+
+/[:x:]/I
+Failed: error 112 at offset 0: POSIX named classes are supported only within a class
+
+/\F/I
+Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
+
+/\l/I
+Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
+
+/\L/I
+Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
+
+/\N{name}/I
+Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
+
+/\u/I
+Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
+
+/\U/I
+Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
+
+/a{1,3}b/ungreedy
+ ab
+ 0: ab
+
+/[/I
+Failed: error 106 at offset 1: missing terminating ] for character class
+
+/[a-/I
+Failed: error 106 at offset 3: missing terminating ] for character class
+
+/[[:space:]/I
+Failed: error 106 at offset 10: missing terminating ] for character class
+
+/[\s]/IB
+------------------------------------------------------------------
+ Bra
+ [\x09-\x0d ]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
+Subject length lower bound = 1
+
+/[[:space:]]/IB
+------------------------------------------------------------------
+ Bra
+ [\x09-\x0d ]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
+Subject length lower bound = 1
+
+/[[:space:]abcde]/IB
+------------------------------------------------------------------
+ Bra
+ [\x09-\x0d a-e]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20 a b c d e
+Subject length lower bound = 1
+
+/< (?: (?(R) \d++ | [^<>]*+) | (?R)) * >/Ix
+Capturing subpattern count = 0
+Options: extended
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 2
+ <>
+ 0: <>
+ <abcd>
+ 0: <abcd>
+ <abc <123> hij>
+ 0: <abc <123> hij>
+ <abc <def> hij>
+ 0: <def>
+ <abc<>def>
+ 0: <abc<>def>
+ <abc<>
+ 0: <>
+\= Expect no match
+ <abc
+No match
+
+/8J\$WE\<\.rX\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b/IB
+------------------------------------------------------------------
+ Bra
+ 8J$WE<.rX+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+ \b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = '8'
+Last code unit = 'X'
+Subject length lower bound = 409
+
+/\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b/IB
+------------------------------------------------------------------
+ Bra
+ $<.X+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+ \b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = '$'
+Last code unit = 'X'
+Subject length lower bound = 404
+
+/(.*)\d+\1/I
+Capturing subpattern count = 1
+Max back reference = 1
+Subject length lower bound = 1
+
+/(.*)\d+/I
+Capturing subpattern count = 1
+First code unit at start or follows newline
+Subject length lower bound = 1
+
+/(.*)\d+\1/Is
+Capturing subpattern count = 1
+Max back reference = 1
+Options: dotall
+Subject length lower bound = 1
+
+/(.*)\d+/Is
+Capturing subpattern count = 1
+Compile options: dotall
+Overall options: anchored dotall
+Subject length lower bound = 1
+
+/(.*(xyz))\d+\2/I
+Capturing subpattern count = 2
+Max back reference = 2
+First code unit at start or follows newline
+Last code unit = 'z'
+Subject length lower bound = 7
+
+/((.*))\d+\1/I
+Capturing subpattern count = 2
+Max back reference = 1
+Subject length lower bound = 1
+ abc123bc
+ 0: bc123bc
+ 1: bc
+ 2: bc
+
+/a[b]/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?=a).*/I
+Capturing subpattern count = 0
+May match empty string
+First code unit = 'a'
+Subject length lower bound = 0
+
+/(?=abc).xyz/Ii
+Capturing subpattern count = 0
+Options: caseless
+First code unit = 'a' (caseless)
+Last code unit = 'z' (caseless)
+Subject length lower bound = 4
+
+/(?=abc)(?i).xyz/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'z' (caseless)
+Subject length lower bound = 4
+
+/(?=a)(?=b)/I
+Capturing subpattern count = 0
+May match empty string
+First code unit = 'a'
+Subject length lower bound = 0
+
+/(?=.)a/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+
+/((?=abcda)a)/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'a'
+Subject length lower bound = 1
+
+/((?=abcda)ab)/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/()a/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/(?:(?=.)|(?<!x))a/I
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/(?(1)ab|ac)(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Subject length lower bound = 3
+
+/(?(1)abz|acz)(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Last code unit = 'z'
+Subject length lower bound = 4
+
+/(?(1)abz)(.)/I
+Capturing subpattern count = 1
+Max back reference = 1
+Subject length lower bound = 1
+
+/(?(1)abz)(1)23/I
+Capturing subpattern count = 1
+Max back reference = 1
+Last code unit = '3'
+Subject length lower bound = 3
+
+/(a)+/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/(a){2,3}/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'a'
+Subject length lower bound = 2
+
+/(a)*/I
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+
+/[a]/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+
+/[ab]/I
+Capturing subpattern count = 0
+Starting code units: a b
+Subject length lower bound = 1
+
+/[ab]/I
+Capturing subpattern count = 0
+Starting code units: a b
+Subject length lower bound = 1
+
+/[^a]/I
+Capturing subpattern count = 0
+Subject length lower bound = 1
+
+/\d456/I
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = '6'
+Subject length lower bound = 4
+
+/\d456/I
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = '6'
+Subject length lower bound = 4
+
+/a^b/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/^a/Im
+Capturing subpattern count = 0
+Options: multiline
+First code unit at start or follows newline
+Last code unit = 'a'
+Subject length lower bound = 1
+ abcde
+ 0: a
+ xy\nabc
+ 0: a
+\= Expect no match
+ xyabc
+No match
+
+/c|abc/I
+Capturing subpattern count = 0
+Starting code units: a c
+Last code unit = 'c'
+Subject length lower bound = 1
+
+/(?i)[ab]/I
+Capturing subpattern count = 0
+Starting code units: A B a b
+Subject length lower bound = 1
+
+/[ab](?i)cd/I
+Capturing subpattern count = 0
+Starting code units: a b
+Last code unit = 'd' (caseless)
+Subject length lower bound = 3
+
+/abc(?C)def/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'f'
+Subject length lower bound = 6
+ abcdef
+--->abcdef
+ 0 ^ ^ d
+ 0: abcdef
+ 1234abcdef
+--->1234abcdef
+ 0 ^ ^ d
+ 0: abcdef
+\= Expect no match
+ abcxyz
+No match
+ abcxyzf
+--->abcxyzf
+ 0 ^ ^ d
+No match
+
+/abc(?C)de(?C1)f/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'f'
+Subject length lower bound = 6
+ 123abcdef
+--->123abcdef
+ 0 ^ ^ d
+ 1 ^ ^ f
+ 0: abcdef
+
+/(?C1)\dabc(?C2)def/I
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = 'f'
+Subject length lower bound = 7
+ 1234abcdef
+--->1234abcdef
+ 1 ^ \d
+ 1 ^ \d
+ 1 ^ \d
+ 1 ^ \d
+ 2 ^ ^ d
+ 0: 4abcdef
+\= Expect no match
+ abcdef
+No match
+
+/(?C1)\dabc(?C2)def/I
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = 'f'
+Subject length lower bound = 7
+ 1234abcdef
+--->1234abcdef
+ 1 ^ \d
+ 1 ^ \d
+ 1 ^ \d
+ 1 ^ \d
+ 2 ^ ^ d
+ 0: 4abcdef
+\= Expect no match
+ abcdef
+No match
+
+/(?C255)ab/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?C256)ab/I
+Failed: error 138 at offset 6: number after (?C is greater than 255
+
+/(?Cab)xx/I
+Failed: error 182 at offset 3: unrecognized string delimiter follows (?C
+
+/(?C12vr)x/I
+Failed: error 139 at offset 5: closing parenthesis for (?C expected
+
+/abc(?C)def/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'f'
+Subject length lower bound = 6
+ \x83\x0\x61bcdef
+--->\x83\x00abcdef
+ 0 ^ ^ d
+ 0: abcdef
+
+/(abc)(?C)de(?C1)f/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'f'
+Subject length lower bound = 6
+ 123abcdef
+--->123abcdef
+ 0 ^ ^ d
+ 1 ^ ^ f
+ 0: abcdef
+ 1: abc
+ 123abcdef\=callout_capture
+Callout 0: last capture = 1
+ 1: abc
+--->123abcdef
+ ^ ^ d
+Callout 1: last capture = 1
+ 1: abc
+--->123abcdef
+ ^ ^ f
+ 0: abcdef
+ 1: abc
+ 123abcdefC-\=callout_none
+ 0: abcdef
+ 1: abc
+\= Expect no match
+ 123abcdef\=callout_fail=1
+--->123abcdef
+ 0 ^ ^ d
+ 1 ^ ^ f
+No match
+
+/(?C0)(abc(?C1))*/I
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+ abcabcabc
+--->abcabcabc
+ 0 ^ (
+ 1 ^ ^ )*
+ 1 ^ ^ )*
+ 1 ^ ^ )*
+ 0: abcabcabc
+ 1: abc
+ abcabc\=callout_fail=1:4
+--->abcabc
+ 0 ^ (
+ 1 ^ ^ )*
+ 1 ^ ^ )*
+ 0: abcabc
+ 1: abc
+ abcabcabc\=callout_fail=1:4
+--->abcabcabc
+ 0 ^ (
+ 1 ^ ^ )*
+ 1 ^ ^ )*
+ 1 ^ ^ )*
+ 0: abcabc
+ 1: abc
+
+/(\d{3}(?C))*/I
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+ 123\=callout_capture
+Callout 0: last capture = 0
+--->123
+ ^ ^ )*
+ 0: 123
+ 1: 123
+ 123456\=callout_capture
+Callout 0: last capture = 0
+--->123456
+ ^ ^ )*
+Callout 0: last capture = 1
+ 1: 123
+--->123456
+ ^ ^ )*
+ 0: 123456
+ 1: 456
+ 123456789\=callout_capture
+Callout 0: last capture = 0
+--->123456789
+ ^ ^ )*
+Callout 0: last capture = 1
+ 1: 123
+--->123456789
+ ^ ^ )*
+Callout 0: last capture = 1
+ 1: 456
+--->123456789
+ ^ ^ )*
+ 0: 123456789
+ 1: 789
+
+/((xyz)(?C)p|(?C1)xyzabc)/I
+Capturing subpattern count = 2
+First code unit = 'x'
+Subject length lower bound = 4
+ xyzabc\=callout_capture
+Callout 0: last capture = 2
+ 1: <unset>
+ 2: xyz
+--->xyzabc
+ ^ ^ p
+Callout 1: last capture = 0
+--->xyzabc
+ ^ x
+ 0: xyzabc
+ 1: xyzabc
+
+/(X)((xyz)(?C)p|(?C1)xyzabc)/I
+Capturing subpattern count = 3
+First code unit = 'X'
+Last code unit = 'x'
+Subject length lower bound = 5
+ Xxyzabc\=callout_capture
+Callout 0: last capture = 3
+ 1: X
+ 2: <unset>
+ 3: xyz
+--->Xxyzabc
+ ^ ^ p
+Callout 1: last capture = 1
+ 1: X
+--->Xxyzabc
+ ^^ x
+ 0: Xxyzabc
+ 1: X
+ 2: xyzabc
+
+/(?=(abc))(?C)abcdef/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'f'
+Subject length lower bound = 6
+ abcdef\=callout_capture
+Callout 0: last capture = 1
+ 1: abc
+--->abcdef
+ ^ a
+ 0: abcdef
+ 1: abc
+
+/(?!(abc)(?C1)d)(?C2)abcxyz/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'z'
+Subject length lower bound = 6
+ abcxyz\=callout_capture
+Callout 1: last capture = 1
+ 1: abc
+--->abcxyz
+ ^ ^ d
+Callout 2: last capture = 0
+--->abcxyz
+ ^ a
+ 0: abcxyz
+
+/(?<=(abc)(?C))xyz/I
+Capturing subpattern count = 1
+Max lookbehind = 3
+First code unit = 'x'
+Last code unit = 'z'
+Subject length lower bound = 3
+ abcxyz\=callout_capture
+Callout 0: last capture = 1
+ 1: abc
+--->abcxyz
+ ^ )
+ 0: xyz
+ 1: abc
+
+/a(b+)(c*)(?C1)/I
+Capturing subpattern count = 2
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+\= Expect no match
+ abbbbbccc\=callout_data=1
+--->abbbbbccc
+ 1 ^ ^ End of pattern
+Callout data = 1
+No match
+
+/a(b+?)(c*?)(?C1)/I
+Capturing subpattern count = 2
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+\= Expect no match
+ abbbbbccc\=callout_data=1
+--->abbbbbccc
+ 1 ^ ^ End of pattern
+Callout data = 1
+ 1 ^ ^ End of pattern
+Callout data = 1
+ 1 ^ ^ End of pattern
+Callout data = 1
+ 1 ^ ^ End of pattern
+Callout data = 1
+ 1 ^ ^ End of pattern
+Callout data = 1
+ 1 ^ ^ End of pattern
+Callout data = 1
+ 1 ^ ^ End of pattern
+Callout data = 1
+ 1 ^ ^ End of pattern
+Callout data = 1
+No match
+
+/(?C)abc/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/(?C)^abc/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 3
+
+/(?C)a|b/I
+Capturing subpattern count = 0
+Starting code units: a b
+Subject length lower bound = 1
+
+/a|(b)(?C)/I
+Capturing subpattern count = 1
+Starting code units: a b
+Subject length lower bound = 1
+ b
+--->b
+ 0 ^^ End of pattern
+ 0: b
+ 1: b
+
+/x(ab|(bc|(de|(?R))))/I
+Capturing subpattern count = 3
+First code unit = 'x'
+Subject length lower bound = 3
+ xab
+ 0: xab
+ 1: ab
+ xbc
+ 0: xbc
+ 1: bc
+ 2: bc
+ xde
+ 0: xde
+ 1: de
+ 2: de
+ 3: de
+ xxab
+ 0: xxab
+ 1: xab
+ 2: xab
+ 3: xab
+ xxxab
+ 0: xxxab
+ 1: xxab
+ 2: xxab
+ 3: xxab
+\= Expect no match
+ xyab
+No match
+
+/^([^()]|\((?1)*\))*$/I
+Capturing subpattern count = 1
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+ abc
+ 0: abc
+ 1: c
+ a(b)c
+ 0: a(b)c
+ 1: c
+ a(b(c))d
+ 0: a(b(c))d
+ 1: d
+\= Expect no match)
+ a(b(c)d
+No match
+
+/^>abc>([^()]|\((?1)*\))*<xyz<$/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = '>'
+Last code unit = '<'
+Subject length lower bound = 10
+ >abc>123<xyz<
+ 0: >abc>123<xyz<
+ 1: 3
+ >abc>1(2)3<xyz<
+ 0: >abc>1(2)3<xyz<
+ 1: 3
+ >abc>(1(2)3)<xyz<
+ 0: >abc>(1(2)3)<xyz<
+ 1: (1(2)3)
+
+/(a(?1)b)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ a
+ Recurse
+ b
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(a(?1)+b)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ a
+ SBra
+ Recurse
+ KetRmax
+ b
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+Starting code units: ( - 0 1 2 3 4 5 6 7 8 9
+Subject length lower bound = 1
+ 12
+ 0: 12
+ 1: 12
+ (((2+2)*-3)-7)
+ 0: (((2+2)*-3)-7)
+ 1: (((2+2)*-3)-7)
+ 2: -
+ -12
+ 0: -12
+ 1: -12
+\= Expect no match
+ ((2+2)*-3)-7)
+No match
+
+/^(x(y|(?1){2})z)/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+First code unit = 'x'
+Subject length lower bound = 3
+ xyz
+ 0: xyz
+ 1: xyz
+ 2: y
+ xxyzxyzz
+ 0: xxyzxyzz
+ 1: xxyzxyzz
+ 2: xyzxyz
+\= Expect no match
+ xxyzz
+No match
+ xxyzxyzxyzz
+No match
+
+/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/Ix
+Capturing subpattern count = 2
+Options: extended
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 2
+ <>
+ 0: <>
+ 1: <>
+ 2: <>
+ <abcd>
+ 0: <abcd>
+ 1: <abcd>
+ 2: <abcd>
+ <abc <123> hij>
+ 0: <abc <123> hij>
+ 1: <abc <123> hij>
+ 2: <abc <123> hij>
+ <abc <def> hij>
+ 0: <def>
+ 1: <def>
+ 2: <def>
+ <abc<>def>
+ 0: <abc<>def>
+ 1: <abc<>def>
+ 2: <abc<>def>
+ <abc<>
+ 0: <>
+ 1: <>
+ 2: <>
+\= Expect no match
+ <abc
+No match
+
+/(?1)/I
+Failed: error 115 at offset 3: reference to non-existent subpattern
+
+/((?2)(abc)/I
+Failed: error 114 at offset 10: missing closing parenthesis
+
+/^(abc)def(?1)/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 9
+ abcdefabc
+ 0: abcdefabc
+ 1: abc
+
+/^(a|b|c)=(?1)+/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+Starting code units: a b c
+Subject length lower bound = 2
+ a=a
+ 0: a=a
+ 1: a
+ a=b
+ 0: a=b
+ 1: a
+ a=bc
+ 0: a=bc
+ 1: a
+
+/^(a|b|c)=((?1))+/I
+Capturing subpattern count = 2
+Compile options: <none>
+Overall options: anchored
+Starting code units: a b c
+Subject length lower bound = 2
+ a=a
+ 0: a=a
+ 1: a
+ 2: a
+ a=b
+ 0: a=b
+ 1: a
+ 2: b
+ a=bc
+ 0: a=bc
+ 1: a
+ 2: c
+
+/a(?P<name1>b|c)d(?P<longername2>e)/IB
+------------------------------------------------------------------
+ Bra
+ a
+ CBra 1
+ b
+ Alt
+ c
+ Ket
+ d
+ CBra 2
+ e
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ longername2 2
+ name1 1
+First code unit = 'a'
+Last code unit = 'e'
+Subject length lower bound = 4
+ abde
+ 0: abde
+ 1: b
+ 2: e
+ acde
+ 0: acde
+ 1: c
+ 2: e
+
+/(?:a(?P<c>c(?P<d>d)))(?P<a>a)/IB
+------------------------------------------------------------------
+ Bra
+ Bra
+ a
+ CBra 1
+ c
+ CBra 2
+ d
+ Ket
+ Ket
+ Ket
+ CBra 3
+ a
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ a 3
+ c 1
+ d 2
+First code unit = 'a'
+Last code unit = 'a'
+Subject length lower bound = 4
+
+/(?P<a>a)...(?P=a)bbb(?P>a)d/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ a
+ Ket
+ Any
+ Any
+ Any
+ \1
+ bbb
+ Recurse
+ d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ a 1
+First code unit = 'a'
+Last code unit = 'd'
+Subject length lower bound = 10
+
+/^\W*(?:(?P<one>(?P<two>.)\W*(?P>one)\W*(?P=two)|)|(?P<three>(?P<four>.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/Ii
+Capturing subpattern count = 4
+Max back reference = 4
+Named capturing subpatterns:
+ four 4
+ one 1
+ three 3
+ two 2
+May match empty string
+Compile options: caseless
+Overall options: anchored caseless
+Subject length lower bound = 0
+ 1221
+ 0: 1221
+ 1: 1221
+ 2: 1
+ Satan, oscillate my metallic sonatas!
+ 0: Satan, oscillate my metallic sonatas!
+ 1: <unset>
+ 2: <unset>
+ 3: Satan, oscillate my metallic sonatas
+ 4: S
+ A man, a plan, a canal: Panama!
+ 0: A man, a plan, a canal: Panama!
+ 1: <unset>
+ 2: <unset>
+ 3: A man, a plan, a canal: Panama
+ 4: A
+ Able was I ere I saw Elba.
+ 0: Able was I ere I saw Elba.
+ 1: <unset>
+ 2: <unset>
+ 3: Able was I ere I saw Elba
+ 4: A
+\= Expect no match
+ The quick brown fox
+No match
+
+/((?(R)a|b))\1(?1)?/I
+Capturing subpattern count = 1
+Max back reference = 1
+Subject length lower bound = 2
+ bb
+ 0: bb
+ 1: b
+ bbaa
+ 0: bba
+ 1: b
+
+/(.*)a/Is
+Capturing subpattern count = 1
+Compile options: dotall
+Overall options: anchored dotall
+Last code unit = 'a'
+Subject length lower bound = 1
+
+/(.*)a\1/Is
+Capturing subpattern count = 1
+Max back reference = 1
+Options: dotall
+Last code unit = 'a'
+Subject length lower bound = 1
+
+/(.*)a(b)\2/Is
+Capturing subpattern count = 2
+Max back reference = 2
+Compile options: dotall
+Overall options: anchored dotall
+Last code unit = 'b'
+Subject length lower bound = 3
+
+/((.*)a|(.*)b)z/Is
+Capturing subpattern count = 3
+Compile options: dotall
+Overall options: anchored dotall
+Last code unit = 'z'
+Subject length lower bound = 2
+
+/((.*)a|(.*)b)z\1/Is
+Capturing subpattern count = 3
+Max back reference = 1
+Options: dotall
+Last code unit = 'z'
+Subject length lower bound = 3
+
+/((.*)a|(.*)b)z\2/Is
+Capturing subpattern count = 3
+Max back reference = 2
+Options: dotall
+Last code unit = 'z'
+Subject length lower bound = 2
+
+/((.*)a|(.*)b)z\3/Is
+Capturing subpattern count = 3
+Max back reference = 3
+Options: dotall
+Last code unit = 'z'
+Subject length lower bound = 2
+
+/((.*)a|^(.*)b)z\3/Is
+Capturing subpattern count = 3
+Max back reference = 3
+Compile options: dotall
+Overall options: anchored dotall
+Last code unit = 'z'
+Subject length lower bound = 2
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/Is
+Capturing subpattern count = 31
+May match empty string
+Compile options: dotall
+Overall options: anchored dotall
+Subject length lower bound = 0
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/Is
+Capturing subpattern count = 31
+Max back reference = 31
+May match empty string
+Options: dotall
+Subject length lower bound = 0
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/Is
+Capturing subpattern count = 32
+Max back reference = 32
+May match empty string
+Options: dotall
+Subject length lower bound = 0
+
+/(a)(bc)/IB,no_auto_capture
+------------------------------------------------------------------
+ Bra
+ Bra
+ a
+ Ket
+ Bra
+ bc
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: no_auto_capture
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+ abc
+ 0: abc
+
+/(?P<one>a)(bc)/IB,no_auto_capture
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ a
+ Ket
+ Bra
+ bc
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ one 1
+Options: no_auto_capture
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+ abc
+ 0: abc
+ 1: a
+
+/(a)(?P<named>bc)/IB,no_auto_capture
+------------------------------------------------------------------
+ Bra
+ Bra
+ a
+ Ket
+ CBra 1
+ bc
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ named 1
+Options: no_auto_capture
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/(aaa(?C1)bbb|ab)/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ aaabbb
+--->aaabbb
+ 1 ^ ^ b
+ 0: aaabbb
+ 1: aaabbb
+ aaabbb\=callout_data=0
+--->aaabbb
+ 1 ^ ^ b
+ 0: aaabbb
+ 1: aaabbb
+ aaabbb\=callout_data=1
+--->aaabbb
+ 1 ^ ^ b
+Callout data = 1
+ 0: ab
+ 1: ab
+\= Expect no match
+ aaabbb\=callout_data=-1
+--->aaabbb
+ 1 ^ ^ b
+Callout data = -1
+No match
+
+/ab(?P<one>cd)ef(?P<two>gh)/I
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ one 1
+ two 2
+First code unit = 'a'
+Last code unit = 'h'
+Subject length lower bound = 8
+ abcdefgh
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+ abcdefgh\=copy=1,get=two
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+ 1C cd (2)
+ G gh (2) two (group 2)
+ abcdefgh\=copy=one,copy=two
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+ C cd (2) one (group 1)
+ C gh (2) two (group 2)
+ abcdefgh\=copy=three
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+Number not found for group 'three'
+Copy substring 'three' failed (-49): unknown substring
+
+/(?P<Tes>)(?P<Test>)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ Ket
+ CBra 2
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ Tes 1
+ Test 2
+May match empty string
+Subject length lower bound = 0
+
+/(?P<Test>)(?P<Tes>)/IB
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ Ket
+ CBra 2
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ Tes 2
+ Test 1
+May match empty string
+Subject length lower bound = 0
+
+/(?P<Z>zz)(?P<A>aa)/I
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ A 2
+ Z 1
+First code unit = 'z'
+Last code unit = 'a'
+Subject length lower bound = 4
+ zzaa\=copy=Z
+ 0: zzaa
+ 1: zz
+ 2: aa
+ C zz (2) Z (group 1)
+ zzaa\=copy=A
+ 0: zzaa
+ 1: zz
+ 2: aa
+ C aa (2) A (group 2)
+
+/(?P<x>eks)(?P<x>eccs)/I
+Failed: error 143 at offset 16: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
+
+/(?P<abc>abc(?P<def>def)(?P<abc>xyz))/I
+Failed: error 143 at offset 31: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
+
+"\[((?P<elem>\d+)(,(?P>elem))*)\]"I
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ elem 2
+First code unit = '['
+Last code unit = ']'
+Subject length lower bound = 3
+ [10,20,30,5,5,4,4,2,43,23,4234]
+ 0: [10,20,30,5,5,4,4,2,43,23,4234]
+ 1: 10,20,30,5,5,4,4,2,43,23,4234
+ 2: 10
+ 3: ,4234
+\= Expect no match
+ []
+No match
+
+"\[((?P<elem>\d+)(,(?P>elem))*)?\]"I
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ elem 2
+First code unit = '['
+Last code unit = ']'
+Subject length lower bound = 2
+ [10,20,30,5,5,4,4,2,43,23,4234]
+ 0: [10,20,30,5,5,4,4,2,43,23,4234]
+ 1: 10,20,30,5,5,4,4,2,43,23,4234
+ 2: 10
+ 3: ,4234
+ []
+ 0: []
+
+/(a(b(?2)c))?/IB
+------------------------------------------------------------------
+ Bra
+ Brazero
+ CBra 1
+ a
+ CBra 2
+ b
+ Recurse
+ c
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+May match empty string
+Subject length lower bound = 0
+
+/(a(b(?2)c))*/IB
+------------------------------------------------------------------
+ Bra
+ Brazero
+ CBra 1
+ a
+ CBra 2
+ b
+ Recurse
+ c
+ Ket
+ KetRmax
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+May match empty string
+Subject length lower bound = 0
+
+/(a(b(?2)c)){0,2}/IB
+------------------------------------------------------------------
+ Bra
+ Brazero
+ Bra
+ CBra 1
+ a
+ CBra 2
+ b
+ Recurse
+ c
+ Ket
+ Ket
+ Brazero
+ CBra 1
+ a
+ CBra 2
+ b
+ Recurse
+ c
+ Ket
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+May match empty string
+Subject length lower bound = 0
+
+/[ab]{1}+/B
+------------------------------------------------------------------
+ Bra
+ [ab]
+ Ket
+ End
+------------------------------------------------------------------
+
+/()(?1){1}/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ Ket
+ Recurse
+ Ket
+ End
+------------------------------------------------------------------
+
+/()(?1)/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ Ket
+ Recurse
+ Ket
+ End
+------------------------------------------------------------------
+
+/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
+Capturing subpattern count = 3
+Options: caseless
+Last code unit = 'g' (caseless)
+Subject length lower bound = 8
+ Baby Bjorn Active Carrier - With free SHIPPING!!
+ 0: Baby Bjorn Active Carrier - With free SHIPPING!!
+ 1: Baby Bjorn Active Carrier - With free SHIPPING!!
+
+/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
+Capturing subpattern count = 3
+Options: caseless
+Last code unit = 'g' (caseless)
+Subject length lower bound = 8
+ Baby Bjorn Active Carrier - With free SHIPPING!!
+ 0: Baby Bjorn Active Carrier - With free SHIPPING!!
+ 1: Baby Bjorn Active Carrier - With free SHIPPING!!
+
+/a*.*b/IB
+------------------------------------------------------------------
+ Bra
+ a*
+ Any*
+ b
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Last code unit = 'b'
+Subject length lower bound = 1
+
+/(a|b)*.?c/IB
+------------------------------------------------------------------
+ Bra
+ Brazero
+ CBra 1
+ a
+ Alt
+ b
+ KetRmax
+ Any?
+ c
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Last code unit = 'c'
+Subject length lower bound = 1
+
+/abc(?C255)de(?C)f/IB
+------------------------------------------------------------------
+ Bra
+ abc
+ Callout 255 10 1
+ de
+ Callout 0 16 1
+ f
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'f'
+Subject length lower bound = 6
+
+/abcde/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ a
+ Callout 255 1 1
+ b
+ Callout 255 2 1
+ c
+ Callout 255 3 1
+ d
+ Callout 255 4 1
+ e
+ Callout 255 5 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: auto_callout
+First code unit = 'a'
+Last code unit = 'e'
+Subject length lower bound = 5
+ abcde
+--->abcde
+ +0 ^ a
+ +1 ^^ b
+ +2 ^ ^ c
+ +3 ^ ^ d
+ +4 ^ ^ e
+ +5 ^ ^ End of pattern
+ 0: abcde
+\= Expect no match
+ abcdfe
+--->abcdfe
+ +0 ^ a
+ +1 ^^ b
+ +2 ^ ^ c
+ +3 ^ ^ d
+ +4 ^ ^ e
+No match
+
+/a*b/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 2
+ a*+
+ Callout 255 2 1
+ b
+ Callout 255 3 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: auto_callout
+Starting code units: a b
+Last code unit = 'b'
+Subject length lower bound = 1
+ ab
+--->ab
+ +0 ^ a*
+ +2 ^^ b
+ +3 ^ ^ End of pattern
+ 0: ab
+ aaaab
+--->aaaab
+ +0 ^ a*
+ +2 ^ ^ b
+ +3 ^ ^ End of pattern
+ 0: aaaab
+ aaaacb
+--->aaaacb
+ +0 ^ a*
+ +2 ^ ^ b
+ +0 ^ a*
+ +2 ^ ^ b
+ +0 ^ a*
+ +2 ^ ^ b
+ +0 ^ a*
+ +2 ^^ b
+ +0 ^ a*
+ +2 ^ b
+ +3 ^^ End of pattern
+ 0: b
+
+/a*b/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 2
+ a*+
+ Callout 255 2 1
+ b
+ Callout 255 3 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: auto_callout
+Starting code units: a b
+Last code unit = 'b'
+Subject length lower bound = 1
+ ab
+--->ab
+ +0 ^ a*
+ +2 ^^ b
+ +3 ^ ^ End of pattern
+ 0: ab
+ aaaab
+--->aaaab
+ +0 ^ a*
+ +2 ^ ^ b
+ +3 ^ ^ End of pattern
+ 0: aaaab
+ aaaacb
+--->aaaacb
+ +0 ^ a*
+ +2 ^ ^ b
+ +0 ^ a*
+ +2 ^ ^ b
+ +0 ^ a*
+ +2 ^ ^ b
+ +0 ^ a*
+ +2 ^^ b
+ +0 ^ a*
+ +2 ^ b
+ +3 ^^ End of pattern
+ 0: b
+
+/a+b/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 2
+ a++
+ Callout 255 2 1
+ b
+ Callout 255 3 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: auto_callout
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ ab
+--->ab
+ +0 ^ a+
+ +2 ^^ b
+ +3 ^ ^ End of pattern
+ 0: ab
+ aaaab
+--->aaaab
+ +0 ^ a+
+ +2 ^ ^ b
+ +3 ^ ^ End of pattern
+ 0: aaaab
+\= Expect no match
+ aaaacb
+--->aaaacb
+ +0 ^ a+
+ +2 ^ ^ b
+ +0 ^ a+
+ +2 ^ ^ b
+ +0 ^ a+
+ +2 ^ ^ b
+ +0 ^ a+
+ +2 ^^ b
+No match
+
+/(abc|def)x/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ CBra 1
+ Callout 255 1 1
+ a
+ Callout 255 2 1
+ b
+ Callout 255 3 1
+ c
+ Callout 255 4 1
+ Alt
+ Callout 255 5 1
+ d
+ Callout 255 6 1
+ e
+ Callout 255 7 1
+ f
+ Callout 255 8 1
+ Ket
+ Callout 255 9 1
+ x
+ Callout 255 10 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: auto_callout
+Starting code units: a d
+Last code unit = 'x'
+Subject length lower bound = 4
+ abcx
+--->abcx
+ +0 ^ (
+ +1 ^ a
+ +2 ^^ b
+ +3 ^ ^ c
+ +4 ^ ^ |
+ +9 ^ ^ x
++10 ^ ^ End of pattern
+ 0: abcx
+ 1: abc
+ defx
+--->defx
+ +0 ^ (
+ +1 ^ a
+ +5 ^ d
+ +6 ^^ e
+ +7 ^ ^ f
+ +8 ^ ^ )
+ +9 ^ ^ x
++10 ^ ^ End of pattern
+ 0: defx
+ 1: def
+\= Expect no match
+ abcdefzx
+--->abcdefzx
+ +0 ^ (
+ +1 ^ a
+ +2 ^^ b
+ +3 ^ ^ c
+ +4 ^ ^ |
+ +9 ^ ^ x
+ +5 ^ d
+ +0 ^ (
+ +1 ^ a
+ +5 ^ d
+ +6 ^^ e
+ +7 ^ ^ f
+ +8 ^ ^ )
+ +9 ^ ^ x
+No match
+
+/(abc|def)x/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ CBra 1
+ Callout 255 1 1
+ a
+ Callout 255 2 1
+ b
+ Callout 255 3 1
+ c
+ Callout 255 4 1
+ Alt
+ Callout 255 5 1
+ d
+ Callout 255 6 1
+ e
+ Callout 255 7 1
+ f
+ Callout 255 8 1
+ Ket
+ Callout 255 9 1
+ x
+ Callout 255 10 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: auto_callout
+Starting code units: a d
+Last code unit = 'x'
+Subject length lower bound = 4
+ abcx
+--->abcx
+ +0 ^ (
+ +1 ^ a
+ +2 ^^ b
+ +3 ^ ^ c
+ +4 ^ ^ |
+ +9 ^ ^ x
++10 ^ ^ End of pattern
+ 0: abcx
+ 1: abc
+ defx
+--->defx
+ +0 ^ (
+ +1 ^ a
+ +5 ^ d
+ +6 ^^ e
+ +7 ^ ^ f
+ +8 ^ ^ )
+ +9 ^ ^ x
++10 ^ ^ End of pattern
+ 0: defx
+ 1: def
+\= Expect no match
+ abcdefzx
+--->abcdefzx
+ +0 ^ (
+ +1 ^ a
+ +2 ^^ b
+ +3 ^ ^ c
+ +4 ^ ^ |
+ +9 ^ ^ x
+ +5 ^ d
+ +0 ^ (
+ +1 ^ a
+ +5 ^ d
+ +6 ^^ e
+ +7 ^ ^ f
+ +8 ^ ^ )
+ +9 ^ ^ x
+No match
+
+/(ab|cd){3,4}/I,auto_callout
+Capturing subpattern count = 1
+Options: auto_callout
+Starting code units: a c
+Subject length lower bound = 6
+ ababab
+--->ababab
+ +0 ^ (
+ +1 ^ a
+ +2 ^^ b
+ +3 ^ ^ |
+ +1 ^ ^ a
+ +2 ^ ^ b
+ +3 ^ ^ |
+ +1 ^ ^ a
+ +2 ^ ^ b
+ +3 ^ ^ |
+ +1 ^ ^ a
+ +4 ^ ^ c
++12 ^ ^ End of pattern
+ 0: ababab
+ 1: ab
+ abcdabcd
+--->abcdabcd
+ +0 ^ (
+ +1 ^ a
+ +2 ^^ b
+ +3 ^ ^ |
+ +1 ^ ^ a
+ +4 ^ ^ c
+ +5 ^ ^ d
+ +6 ^ ^ ){3,4}
+ +1 ^ ^ a
+ +2 ^ ^ b
+ +3 ^ ^ |
+ +1 ^ ^ a
+ +4 ^ ^ c
+ +5 ^ ^ d
+ +6 ^ ^ ){3,4}
++12 ^ ^ End of pattern
+ 0: abcdabcd
+ 1: cd
+ abcdcdcdcdcd
+--->abcdcdcdcdcd
+ +0 ^ (
+ +1 ^ a
+ +2 ^^ b
+ +3 ^ ^ |
+ +1 ^ ^ a
+ +4 ^ ^ c
+ +5 ^ ^ d
+ +6 ^ ^ ){3,4}
+ +1 ^ ^ a
+ +4 ^ ^ c
+ +5 ^ ^ d
+ +6 ^ ^ ){3,4}
+ +1 ^ ^ a
+ +4 ^ ^ c
+ +5 ^ ^ d
+ +6 ^ ^ ){3,4}
++12 ^ ^ End of pattern
+ 0: abcdcdcd
+ 1: cd
+
+/([ab]{,4}c|xy)/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ CBra 1
+ Callout 255 1 4
+ [ab]
+ Callout 255 5 1
+ {
+ Callout 255 6 1
+ ,
+ Callout 255 7 1
+ 4
+ Callout 255 8 1
+ }
+ Callout 255 9 1
+ c
+ Callout 255 10 1
+ Alt
+ Callout 255 11 1
+ x
+ Callout 255 12 1
+ y
+ Callout 255 13 1
+ Ket
+ Callout 255 14 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: auto_callout
+Starting code units: a b x
+Subject length lower bound = 2
+\= Expect no match
+ Note: that { does NOT introduce a quantifier
+--->Note: that { does NOT introduce a quantifier
+ +0 ^ (
+ +1 ^ [ab]
+ +5 ^^ {
++11 ^ x
+ +0 ^ (
+ +1 ^ [ab]
+ +5 ^^ {
++11 ^ x
+ +0 ^ (
+ +1 ^ [ab]
+ +5 ^^ {
++11 ^ x
+No match
+
+/([ab]{,4}c|xy)/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ CBra 1
+ Callout 255 1 4
+ [ab]
+ Callout 255 5 1
+ {
+ Callout 255 6 1
+ ,
+ Callout 255 7 1
+ 4
+ Callout 255 8 1
+ }
+ Callout 255 9 1
+ c
+ Callout 255 10 1
+ Alt
+ Callout 255 11 1
+ x
+ Callout 255 12 1
+ y
+ Callout 255 13 1
+ Ket
+ Callout 255 14 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: auto_callout
+Starting code units: a b x
+Subject length lower bound = 2
+\= Expect no match
+ Note: that { does NOT introduce a quantifier
+--->Note: that { does NOT introduce a quantifier
+ +0 ^ (
+ +1 ^ [ab]
+ +5 ^^ {
++11 ^ x
+ +0 ^ (
+ +1 ^ [ab]
+ +5 ^^ {
++11 ^ x
+ +0 ^ (
+ +1 ^ [ab]
+ +5 ^^ {
++11 ^ x
+No match
+
+/([ab]{1,4}c|xy){4,5}?123/IB,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ CBra 1
+ Callout 255 1 9
+ [ab]{1,4}+
+ Callout 255 10 1
+ c
+ Callout 255 11 1
+ Alt
+ Callout 255 12 1
+ x
+ Callout 255 13 1
+ y
+ Callout 255 14 7
+ Ket
+ CBra 1
+ Callout 255 1 9
+ [ab]{1,4}+
+ Callout 255 10 1
+ c
+ Callout 255 11 1
+ Alt
+ Callout 255 12 1
+ x
+ Callout 255 13 1
+ y
+ Callout 255 14 7
+ Ket
+ CBra 1
+ Callout 255 1 9
+ [ab]{1,4}+
+ Callout 255 10 1
+ c
+ Callout 255 11 1
+ Alt
+ Callout 255 12 1
+ x
+ Callout 255 13 1
+ y
+ Callout 255 14 7
+ Ket
+ CBra 1
+ Callout 255 1 9
+ [ab]{1,4}+
+ Callout 255 10 1
+ c
+ Callout 255 11 1
+ Alt
+ Callout 255 12 1
+ x
+ Callout 255 13 1
+ y
+ Callout 255 14 7
+ Ket
+ Braminzero
+ CBra 1
+ Callout 255 1 9
+ [ab]{1,4}+
+ Callout 255 10 1
+ c
+ Callout 255 11 1
+ Alt
+ Callout 255 12 1
+ x
+ Callout 255 13 1
+ y
+ Callout 255 14 7
+ Ket
+ Callout 255 21 1
+ 1
+ Callout 255 22 1
+ 2
+ Callout 255 23 1
+ 3
+ Callout 255 24 0
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: auto_callout
+Starting code units: a b x
+Last code unit = '3'
+Subject length lower bound = 11
+ aacaacaacaacaac123
+--->aacaacaacaacaac123
+ +0 ^ (
+ +1 ^ [ab]{1,4}
++10 ^ ^ c
++11 ^ ^ |
+ +1 ^ ^ [ab]{1,4}
++10 ^ ^ c
++11 ^ ^ |
+ +1 ^ ^ [ab]{1,4}
++10 ^ ^ c
++11 ^ ^ |
+ +1 ^ ^ [ab]{1,4}
++10 ^ ^ c
++11 ^ ^ |
++21 ^ ^ 1
+ +1 ^ ^ [ab]{1,4}
++10 ^ ^ c
++11 ^ ^ |
++21 ^ ^ 1
++22 ^ ^ 2
++23 ^ ^ 3
++24 ^ ^ End of pattern
+ 0: aacaacaacaacaac123
+ 1: aac
+
+/\b.*/I
+Capturing subpattern count = 0
+Max lookbehind = 1
+May match empty string
+Subject length lower bound = 0
+ ab cd\=offset=1
+ 0: cd
+
+/\b.*/Is
+Capturing subpattern count = 0
+Max lookbehind = 1
+May match empty string
+Options: dotall
+Subject length lower bound = 0
+ ab cd\=startoffset=1
+ 0: cd
+
+/(?!.bcd).*/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ Xbcd12345
+ 0: bcd12345
+
+/abcde/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'e'
+Subject length lower bound = 5
+ ab\=ps
+Partial match: ab
+ abc\=ps
+Partial match: abc
+ abcd\=ps
+Partial match: abcd
+ abcde\=ps
+ 0: abcde
+ the quick brown abc\=ps
+Partial match: abc
+\= Expect no match\=ps
+ the quick brown abxyz fox\=ps
+No match
+
+"^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/(20)?\d\d$"I
+Capturing subpattern count = 3
+Compile options: <none>
+Overall options: anchored
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = '/'
+Subject length lower bound = 6
+ 13/05/04\=ps
+ 0: 13/05/04
+ 1: 13
+ 2: 05
+ 13/5/2004\=ps
+ 0: 13/5/2004
+ 1: 13
+ 2: 5
+ 3: 20
+ 02/05/09\=ps
+ 0: 02/05/09
+ 1: 02
+ 2: 05
+ 1\=ps
+Partial match: 1
+ 1/2\=ps
+Partial match: 1/2
+ 1/2/0\=ps
+Partial match: 1/2/0
+ 1/2/04\=ps
+ 0: 1/2/04
+ 1: 1
+ 2: 2
+ 0\=ps
+Partial match: 0
+ 02/\=ps
+Partial match: 02/
+ 02/0\=ps
+Partial match: 02/0
+ 02/1\=ps
+Partial match: 02/1
+\= Expect no match\=ps
+ \=ps
+No match
+ 123\=ps
+No match
+ 33/4/04\=ps
+No match
+ 3/13/04\=ps
+No match
+ 0/1/2003\=ps
+No match
+ 0/\=ps
+No match
+ 02/0/\=ps
+No match
+ 02/13\=ps
+No match
+
+/0{0,2}ABC/I
+Capturing subpattern count = 0
+Starting code units: 0 A
+Last code unit = 'C'
+Subject length lower bound = 3
+
+/\d{3,}ABC/I
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = 'C'
+Subject length lower bound = 6
+
+/\d*ABC/I
+Capturing subpattern count = 0
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A
+Last code unit = 'C'
+Subject length lower bound = 3
+
+/[abc]+DE/I
+Capturing subpattern count = 0
+Starting code units: a b c
+Last code unit = 'E'
+Subject length lower bound = 3
+
+/[abc]?123/I
+Capturing subpattern count = 0
+Starting code units: 1 a b c
+Last code unit = '3'
+Subject length lower bound = 3
+ 123\=ps
+ 0: 123
+ a\=ps
+Partial match: a
+ b\=ps
+Partial match: b
+ c\=ps
+Partial match: c
+ c12\=ps
+Partial match: c12
+ c123\=ps
+ 0: c123
+
+/^(?:\d){3,5}X/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = 'X'
+Subject length lower bound = 4
+ 1\=ps
+Partial match: 1
+ 123\=ps
+Partial match: 123
+ 123X
+ 0: 123X
+ 1234\=ps
+Partial match: 1234
+ 1234X
+ 0: 1234X
+ 12345\=ps
+Partial match: 12345
+ 12345X
+ 0: 12345X
+\= Expect no match
+ 1X
+No match
+ 123456\=ps
+No match
+
+"<(\w+)/?>(.)*</(\1)>"Igms
+Capturing subpattern count = 3
+Max back reference = 1
+Options: dotall multiline
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 7
+ <!DOCTYPE seite SYSTEM "http://www.lco.lineas.de/xmlCms.dtd">\n<seite>\n<dokumenteninformation>\n<seitentitel>Partner der LCO</seitentitel>\n<sprache>de</sprache>\n<seitenbeschreibung>Partner der LINEAS Consulting\nGmbH</seitenbeschreibung>\n<schluesselworte>LINEAS Consulting GmbH Hamburg\nPartnerfirmen</schluesselworte>\n<revisit>30 days</revisit>\n<robots>index,follow</robots>\n<menueinformation>\n<aktiv>ja</aktiv>\n<menueposition>3</menueposition>\n<menuetext>Partner</menuetext>\n</menueinformation>\n<lastedited>\n<autor>LCO</autor>\n<firma>LINEAS Consulting</firma>\n<datum>15.10.2003</datum>\n</lastedited>\n</dokumenteninformation>\n<inhalt>\n\n<absatzueberschrift>Die Partnerfirmen der LINEAS Consulting\nGmbH</absatzueberschrift>\n\n<absatz><link ziel="http://www.ca.com/" zielfenster="_blank">\n<bild name="logo_ca.gif" rahmen="no"/></link> <link\nziel="http://www.ey.com/" zielfenster="_blank"><bild\nname="logo_euy.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><link ziel="http://www.cisco.de/" zielfenster="_blank">\n<bild name="logo_cisco.gif" rahmen="ja"/></link></absatz>\n\n<absatz><link ziel="http://www.atelion.de/"\nzielfenster="_blank"><bild\nname="logo_atelion.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><link ziel="http://www.line-information.de/"\nzielfenster="_blank">\n<bild name="logo_line_information.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><bild name="logo_aw.gif" rahmen="no"/></absatz>\n\n<absatz><link ziel="http://www.incognis.de/"\nzielfenster="_blank"><bild\nname="logo_incognis.gif" rahmen="no"/></link></absatz>\n\n<absatz><link ziel="http://www.addcraft.com/"\nzielfenster="_blank"><bild\nname="logo_addcraft.gif" rahmen="no"/></link></absatz>\n\n<absatz><link ziel="http://www.comendo.com/"\nzielfenster="_blank"><bild\nname="logo_comendo.gif" rahmen="no"/></link></absatz>\n\n</inhalt>\n</seite>\=jitstack=1024
+ 0: <seite>\x0a<dokumenteninformation>\x0a<seitentitel>Partner der LCO</seitentitel>\x0a<sprache>de</sprache>\x0a<seitenbeschreibung>Partner der LINEAS Consulting\x0aGmbH</seitenbeschreibung>\x0a<schluesselworte>LINEAS Consulting GmbH Hamburg\x0aPartnerfirmen</schluesselworte>\x0a<revisit>30 days</revisit>\x0a<robots>index,follow</robots>\x0a<menueinformation>\x0a<aktiv>ja</aktiv>\x0a<menueposition>3</menueposition>\x0a<menuetext>Partner</menuetext>\x0a</menueinformation>\x0a<lastedited>\x0a<autor>LCO</autor>\x0a<firma>LINEAS Consulting</firma>\x0a<datum>15.10.2003</datum>\x0a</lastedited>\x0a</dokumenteninformation>\x0a<inhalt>\x0a\x0a<absatzueberschrift>Die Partnerfirmen der LINEAS Consulting\x0aGmbH</absatzueberschrift>\x0a\x0a<absatz><link ziel="http://www.ca.com/" zielfenster="_blank">\x0a<bild name="logo_ca.gif" rahmen="no"/></link> <link\x0aziel="http://www.ey.com/" zielfenster="_blank"><bild\x0aname="logo_euy.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><link ziel="http://www.cisco.de/" zielfenster="_blank">\x0a<bild name="logo_cisco.gif" rahmen="ja"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.atelion.de/"\x0azielfenster="_blank"><bild\x0aname="logo_atelion.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><link ziel="http://www.line-information.de/"\x0azielfenster="_blank">\x0a<bild name="logo_line_information.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><bild name="logo_aw.gif" rahmen="no"/></absatz>\x0a\x0a<absatz><link ziel="http://www.incognis.de/"\x0azielfenster="_blank"><bild\x0aname="logo_incognis.gif" rahmen="no"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.addcraft.com/"\x0azielfenster="_blank"><bild\x0aname="logo_addcraft.gif" rahmen="no"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.comendo.com/"\x0azielfenster="_blank"><bild\x0aname="logo_comendo.gif" rahmen="no"/></link></absatz>\x0a\x0a</inhalt>\x0a</seite>
+ 1: seite
+ 2: \x0a
+ 3: seite
+
+/line\nbreak/I
+Capturing subpattern count = 0
+Contains explicit CR or LF match
+First code unit = 'l'
+Last code unit = 'k'
+Subject length lower bound = 10
+ this is a line\nbreak
+ 0: line\x0abreak
+ line one\nthis is a line\nbreak in the second line
+ 0: line\x0abreak
+
+/line\nbreak/I,firstline
+Capturing subpattern count = 0
+Contains explicit CR or LF match
+Options: firstline
+First code unit = 'l'
+Last code unit = 'k'
+Subject length lower bound = 10
+ this is a line\nbreak
+ 0: line\x0abreak
+\= Expect no match
+ line one\nthis is a line\nbreak in the second line
+No match
+
+/line\nbreak/Im,firstline
+Capturing subpattern count = 0
+Contains explicit CR or LF match
+Options: firstline multiline
+First code unit = 'l'
+Last code unit = 'k'
+Subject length lower bound = 10
+ this is a line\nbreak
+ 0: line\x0abreak
+\= Expect no match
+ line one\nthis is a line\nbreak in the second line
+No match
+
+/(?i)(?-i)AbCd/I
+Capturing subpattern count = 0
+First code unit = 'A'
+Last code unit = 'd'
+Subject length lower bound = 4
+ AbCd
+ 0: AbCd
+\= Expect no match
+ abcd
+No match
+
+/a{11111111111111111111}/I
+Failed: error 105 at offset 8: number too big in {} quantifier
+
+/(){64294967295}/I
+Failed: error 105 at offset 9: number too big in {} quantifier
+
+/(){2,4294967295}/I
+Failed: error 105 at offset 11: number too big in {} quantifier
+
+"(?i:a)(?i:b)(?i:c)(?i:d)(?i:e)(?i:f)(?i:g)(?i:h)(?i:i)(?i:j)(k)(?i:l)A\1B"I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a' (caseless)
+Last code unit = 'B'
+Subject length lower bound = 15
+ abcdefghijklAkB
+ 0: abcdefghijklAkB
+ 1: k
+
+"(?P<n0>a)(?P<n1>b)(?P<n2>c)(?P<n3>d)(?P<n4>e)(?P<n5>f)(?P<n6>g)(?P<n7>h)(?P<n8>i)(?P<n9>j)(?P<n10>k)(?P<n11>l)A\11B"I
+Capturing subpattern count = 12
+Max back reference = 11
+Named capturing subpatterns:
+ n0 1
+ n1 2
+ n10 11
+ n11 12
+ n2 3
+ n3 4
+ n4 5
+ n5 6
+ n6 7
+ n7 8
+ n8 9
+ n9 10
+First code unit = 'a'
+Last code unit = 'B'
+Subject length lower bound = 15
+ abcdefghijklAkB
+ 0: abcdefghijklAkB
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: l
+
+"(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)A\11B"I
+Capturing subpattern count = 12
+Max back reference = 11
+First code unit = 'a'
+Last code unit = 'B'
+Subject length lower bound = 15
+ abcdefghijklAkB
+ 0: abcdefghijklAkB
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: l
+
+"(?P<name0>a)(?P<name1>a)(?P<name2>a)(?P<name3>a)(?P<name4>a)(?P<name5>a)(?P<name6>a)(?P<name7>a)(?P<name8>a)(?P<name9>a)(?P<name10>a)(?P<name11>a)(?P<name12>a)(?P<name13>a)(?P<name14>a)(?P<name15>a)(?P<name16>a)(?P<name17>a)(?P<name18>a)(?P<name19>a)(?P<name20>a)(?P<name21>a)(?P<name22>a)(?P<name23>a)(?P<name24>a)(?P<name25>a)(?P<name26>a)(?P<name27>a)(?P<name28>a)(?P<name29>a)(?P<name30>a)(?P<name31>a)(?P<name32>a)(?P<name33>a)(?P<name34>a)(?P<name35>a)(?P<name36>a)(?P<name37>a)(?P<name38>a)(?P<name39>a)(?P<name40>a)(?P<name41>a)(?P<name42>a)(?P<name43>a)(?P<name44>a)(?P<name45>a)(?P<name46>a)(?P<name47>a)(?P<name48>a)(?P<name49>a)(?P<name50>a)(?P<name51>a)(?P<name52>a)(?P<name53>a)(?P<name54>a)(?P<name55>a)(?P<name56>a)(?P<name57>a)(?P<name58>a)(?P<name59>a)(?P<name60>a)(?P<name61>a)(?P<name62>a)(?P<name63>a)(?P<name64>a)(?P<name65>a)(?P<name66>a)(?P<name67>a)(?P<name68>a)(?P<name69>a)(?P<name70>a)(?P<name71>a)(?P<name72>a)(?P<name73>a)(?P<name74>a)(?P<name75>a)(?P<name76>a)(?P<name77>a)(?P<name78>a)(?P<name79>a)(?P<name80>a)(?P<name81>a)(?P<name82>a)(?P<name83>a)(?P<name84>a)(?P<name85>a)(?P<name86>a)(?P<name87>a)(?P<name88>a)(?P<name89>a)(?P<name90>a)(?P<name91>a)(?P<name92>a)(?P<name93>a)(?P<name94>a)(?P<name95>a)(?P<name96>a)(?P<name97>a)(?P<name98>a)(?P<name99>a)(?P<name100>a)"I
+Capturing subpattern count = 101
+Named capturing subpatterns:
+ name0 1
+ name1 2
+ name10 11
+ name100 101
+ name11 12
+ name12 13
+ name13 14
+ name14 15
+ name15 16
+ name16 17
+ name17 18
+ name18 19
+ name19 20
+ name2 3
+ name20 21
+ name21 22
+ name22 23
+ name23 24
+ name24 25
+ name25 26
+ name26 27
+ name27 28
+ name28 29
+ name29 30
+ name3 4
+ name30 31
+ name31 32
+ name32 33
+ name33 34
+ name34 35
+ name35 36
+ name36 37
+ name37 38
+ name38 39
+ name39 40
+ name4 5
+ name40 41
+ name41 42
+ name42 43
+ name43 44
+ name44 45
+ name45 46
+ name46 47
+ name47 48
+ name48 49
+ name49 50
+ name5 6
+ name50 51
+ name51 52
+ name52 53
+ name53 54
+ name54 55
+ name55 56
+ name56 57
+ name57 58
+ name58 59
+ name59 60
+ name6 7
+ name60 61
+ name61 62
+ name62 63
+ name63 64
+ name64 65
+ name65 66
+ name66 67
+ name67 68
+ name68 69
+ name69 70
+ name7 8
+ name70 71
+ name71 72
+ name72 73
+ name73 74
+ name74 75
+ name75 76
+ name76 77
+ name77 78
+ name78 79
+ name79 80
+ name8 9
+ name80 81
+ name81 82
+ name82 83
+ name83 84
+ name84 85
+ name85 86
+ name86 87
+ name87 88
+ name88 89
+ name89 90
+ name9 10
+ name90 91
+ name91 92
+ name92 93
+ name93 94
+ name94 95
+ name95 96
+ name96 97
+ name97 98
+ name98 99
+ name99 100
+First code unit = 'a'
+Last code unit = 'a'
+Subject length lower bound = 101
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+Matched, but too many substrings
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+10: a
+11: a
+12: a
+13: a
+14: a
+
+"(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)"I
+Capturing subpattern count = 101
+First code unit = 'a'
+Last code unit = 'a'
+Subject length lower bound = 101
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+Matched, but too many substrings
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+10: a
+11: a
+12: a
+13: a
+14: a
+
+/[^()]*(?:\((?R)\)[^()]*)*/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ (this(and)that
+ 0:
+ (this(and)that)
+ 0: (this(and)that)
+ (this(and)that)stuff
+ 0: (this(and)that)stuff
+
+/[^()]*(?:\((?>(?R))\)[^()]*)*/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ (this(and)that
+ 0:
+ (this(and)that)
+ 0: (this(and)that)
+
+/[^()]*(?:\((?R)\))*[^()]*/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ (this(and)that
+ 0:
+ (this(and)that)
+ 0: (this(and)that)
+
+/(?:\((?R)\))*[^()]*/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ (this(and)that
+ 0:
+ (this(and)that)
+ 0:
+ ((this))
+ 0: ((this))
+
+/(?:\((?R)\))|[^()]*/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ (this(and)that
+ 0:
+ (this(and)that)
+ 0:
+ (this)
+ 0: (this)
+ ((this))
+ 0: ((this))
+
+/\x{0000ff}/I
+Capturing subpattern count = 0
+First code unit = \xff
+Subject length lower bound = 1
+
+/^((?P<A>a1)|(?P<A>a2)b)/I
+Failed: error 143 at offset 18: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
+
+/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ A 2
+ A 3
+Compile options: dupnames
+Overall options: anchored dupnames
+First code unit = 'a'
+Subject length lower bound = 2
+ a1b\=copy=A
+ 0: a1
+ 1: a1
+ 2: a1
+ C a1 (2) A (non-unique)
+ a2b\=copy=A
+ 0: a2b
+ 1: a2b
+ 2: <unset>
+ 3: a2
+ C a2 (2) A (non-unique)
+ a1b\=copy=Z,copy=A
+ 0: a1
+ 1: a1
+ 2: a1
+Number not found for group 'Z'
+Copy substring 'Z' failed (-49): unknown substring
+ C a1 (2) A (non-unique)
+
+/(?|(?<a>)(?<b>)(?<a>)|(?<a>)(?<b>)(?<a>))/I,dupnames
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ a 1
+ a 3
+ b 2
+May match empty string
+Options: dupnames
+Subject length lower bound = 0
+
+/^(?P<A>a)(?P<A>b)/I,dupnames
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ A 1
+ A 2
+Compile options: dupnames
+Overall options: anchored dupnames
+First code unit = 'a'
+Subject length lower bound = 2
+ ab\=copy=A
+ 0: ab
+ 1: a
+ 2: b
+ C a (1) A (non-unique)
+
+/^(?P<A>a)(?P<A>b)|cd/I,dupnames
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ A 1
+ A 2
+Options: dupnames
+Starting code units: a c
+Subject length lower bound = 2
+ ab\=copy=A
+ 0: ab
+ 1: a
+ 2: b
+ C a (1) A (non-unique)
+ cd\=copy=A
+ 0: cd
+Copy substring 'A' failed (-55): requested value is not set
+
+/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
+Capturing subpattern count = 4
+Named capturing subpatterns:
+ A 1
+ A 2
+ A 3
+ A 4
+Options: dupnames
+Starting code units: a c
+Subject length lower bound = 2
+ cdefgh\=copy=A
+ 0: cdefgh
+ 1: <unset>
+ 2: <unset>
+ 3: ef
+ 4: gh
+ C ef (2) A (non-unique)
+
+/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ A 2
+ A 3
+Compile options: dupnames
+Overall options: anchored dupnames
+First code unit = 'a'
+Subject length lower bound = 2
+ a1b\=get=A
+ 0: a1
+ 1: a1
+ 2: a1
+ G a1 (2) A (non-unique)
+ a2b\=get=A
+ 0: a2b
+ 1: a2b
+ 2: <unset>
+ 3: a2
+ G a2 (2) A (non-unique)
+ a1b\=get=Z,get=A
+ 0: a1
+ 1: a1
+ 2: a1
+Number not found for group 'Z'
+Get substring 'Z' failed (-49): unknown substring
+ G a1 (2) A (non-unique)
+
+/^(?P<A>a)(?P<A>b)/I,dupnames
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ A 1
+ A 2
+Compile options: dupnames
+Overall options: anchored dupnames
+First code unit = 'a'
+Subject length lower bound = 2
+ ab\=get=A
+ 0: ab
+ 1: a
+ 2: b
+ G a (1) A (non-unique)
+
+/^(?P<A>a)(?P<A>b)|cd/I,dupnames
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ A 1
+ A 2
+Options: dupnames
+Starting code units: a c
+Subject length lower bound = 2
+ ab\=get=A
+ 0: ab
+ 1: a
+ 2: b
+ G a (1) A (non-unique)
+ cd\=get=A
+ 0: cd
+Get substring 'A' failed (-55): requested value is not set
+
+/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
+Capturing subpattern count = 4
+Named capturing subpatterns:
+ A 1
+ A 2
+ A 3
+ A 4
+Options: dupnames
+Starting code units: a c
+Subject length lower bound = 2
+ cdefgh\=get=A
+ 0: cdefgh
+ 1: <unset>
+ 2: <unset>
+ 3: ef
+ 4: gh
+ G ef (2) A (non-unique)
+
+/(?J)^((?P<A>a1)|(?P<A>a2)b)/I
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ A 2
+ A 3
+Compile options: <none>
+Overall options: anchored
+Duplicate name status changes
+First code unit = 'a'
+Subject length lower bound = 2
+ a1b\=copy=A
+ 0: a1
+ 1: a1
+ 2: a1
+ C a1 (2) A (non-unique)
+ a2b\=copy=A
+ 0: a2b
+ 1: a2b
+ 2: <unset>
+ 3: a2
+ C a2 (2) A (non-unique)
+
+/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<A>d)/I
+Failed: error 143 at offset 38: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
+
+# In this next test, J is not set at the outer level; consequently it isn't set
+# in the pattern's options; consequently pcre2_substring_get_byname() produces
+# a random value.
+
+/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<C>d)/I
+Capturing subpattern count = 4
+Named capturing subpatterns:
+ A 1
+ B 2
+ B 3
+ C 4
+Compile options: <none>
+Overall options: anchored
+Duplicate name status changes
+First code unit = 'a'
+Subject length lower bound = 6
+ a bc d\=copy=A,copy=B,copy=C
+ 0: a bc d
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ C a (1) A (group 1)
+ C b (1) B (non-unique)
+ C d (1) C (group 4)
+
+/^(?P<A>a)?(?(A)a|b)/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ A 1
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 1
+ aabc
+ 0: aa
+ 1: a
+ bc
+ 0: b
+\= Expect no match
+ abc
+No match
+
+/(?:(?(ZZ)a|b)(?P<ZZ>X))+/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ ZZ 1
+Last code unit = 'X'
+Subject length lower bound = 2
+ bXaX
+ 0: bXaX
+ 1: X
+
+/(?:(?(2y)a|b)(X))+/I
+Failed: error 124 at offset 7: missing closing parenthesis for condition
+
+/(?:(?(ZA)a|b)(?P<ZZ>X))+/I
+Failed: error 115 at offset 6: reference to non-existent subpattern
+
+/(?:(?(ZZ)a|b)(?(ZZ)a|b)(?P<ZZ>X))+/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ ZZ 1
+Last code unit = 'X'
+Subject length lower bound = 3
+ bbXaaX
+ 0: bbXaaX
+ 1: X
+
+/(?:(?(ZZ)a|\(b\))\\(?P<ZZ>X))+/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ ZZ 1
+Last code unit = 'X'
+Subject length lower bound = 3
+ (b)\\Xa\\X
+ 0: (b)\Xa\X
+ 1: X
+
+/(?P<ABC/I
+Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator)
+
+/(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ A 1
+Subject length lower bound = 2
+ bXXaYYaY
+ 0: bXXaYYaY
+ 1: Y
+ bXYaXXaX
+ 0: bX
+ 1: X
+
+/()()()()()()()()()(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
+Capturing subpattern count = 10
+Max back reference = 10
+Named capturing subpatterns:
+ A 10
+Subject length lower bound = 2
+ bXXaYYaY
+ 0: bXXaYYaY
+ 1:
+ 2:
+ 3:
+ 4:
+ 5:
+ 6:
+ 7:
+ 8:
+ 9:
+10: Y
+
+/\s*,\s*/I
+Capturing subpattern count = 0
+Starting code units: \x09 \x0a \x0b \x0c \x0d \x20 ,
+Last code unit = ','
+Subject length lower bound = 1
+ \x0b,\x0b
+ 0: \x0b,\x0b
+ \x0c,\x0d
+ 0: \x0c,\x0d
+
+/^abc/Im,newline=lf
+Capturing subpattern count = 0
+Options: multiline
+Forced newline is LF
+First code unit at start or follows newline
+Last code unit = 'c'
+Subject length lower bound = 3
+ xyz\nabc
+ 0: abc
+ xyz\r\nabc
+ 0: abc
+\= Expect no match
+ xyz\rabc
+No match
+ xyzabc\r
+No match
+ xyzabc\rpqr
+No match
+ xyzabc\r\n
+No match
+ xyzabc\r\npqr
+No match
+
+/^abc/Im,newline=crlf
+Capturing subpattern count = 0
+Options: multiline
+Forced newline is CRLF
+First code unit at start or follows newline
+Last code unit = 'c'
+Subject length lower bound = 3
+ xyz\r\nabclf>
+ 0: abc
+\= Expect no match
+ xyz\nabclf
+No match
+ xyz\rabclf
+No match
+
+/^abc/Im,newline=cr
+Capturing subpattern count = 0
+Options: multiline
+Forced newline is CR
+First code unit at start or follows newline
+Last code unit = 'c'
+Subject length lower bound = 3
+ xyz\rabc
+ 0: abc
+\= Expect no match
+ xyz\nabc
+No match
+ xyz\r\nabc
+No match
+
+/^abc/Im,newline=bad
+** Invalid value in 'newline=bad'
+
+/.*/I,newline=lf
+Capturing subpattern count = 0
+May match empty string
+Forced newline is LF
+First code unit at start or follows newline
+Subject length lower bound = 0
+ abc\ndef
+ 0: abc
+ abc\rdef
+ 0: abc\x0ddef
+ abc\r\ndef
+ 0: abc\x0d
+
+/.*/I,newline=cr
+Capturing subpattern count = 0
+May match empty string
+Forced newline is CR
+First code unit at start or follows newline
+Subject length lower bound = 0
+ abc\ndef
+ 0: abc\x0adef
+ abc\rdef
+ 0: abc
+ abc\r\ndef
+ 0: abc
+
+/.*/I,newline=crlf
+Capturing subpattern count = 0
+May match empty string
+Forced newline is CRLF
+First code unit at start or follows newline
+Subject length lower bound = 0
+ abc\ndef
+ 0: abc\x0adef
+ abc\rdef
+ 0: abc\x0ddef
+ abc\r\ndef
+ 0: abc
+
+/\w+(.)(.)?def/Is
+Capturing subpattern count = 2
+Options: dotall
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P
+ Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Last code unit = 'f'
+Subject length lower bound = 5
+ abc\ndef
+ 0: abc\x0adef
+ 1: \x0a
+ abc\rdef
+ 0: abc\x0ddef
+ 1: \x0d
+ abc\r\ndef
+ 0: abc\x0d\x0adef
+ 1: \x0d
+ 2: \x0a
+
+/(?P<B>25[0-5]|2[0-4]\d|[01]?\d?\d)(?:\.(?P>B)){3}/I
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ B 1
+Starting code units: 0 1 2 3 4 5 6 7 8 9
+Last code unit = '.'
+Subject length lower bound = 7
+
+/()()()()()()()()()()()()()()()()()()()()
+ ()()()()()()()()()()()()()()()()()()()()
+ ()()()()()()()()()()()()()()()()()()()()
+ ()()()()()()()()()()()()()()()()()()()()
+ ()()()()()()()()()()()()()()()()()()()()
+ (.(.))/Ix
+Capturing subpattern count = 102
+Options: extended
+Subject length lower bound = 2
+ XY\=ovector=133
+ 0: XY
+ 1:
+ 2:
+ 3:
+ 4:
+ 5:
+ 6:
+ 7:
+ 8:
+ 9:
+10:
+11:
+12:
+13:
+14:
+15:
+16:
+17:
+18:
+19:
+20:
+21:
+22:
+23:
+24:
+25:
+26:
+27:
+28:
+29:
+30:
+31:
+32:
+33:
+34:
+35:
+36:
+37:
+38:
+39:
+40:
+41:
+42:
+43:
+44:
+45:
+46:
+47:
+48:
+49:
+50:
+51:
+52:
+53:
+54:
+55:
+56:
+57:
+58:
+59:
+60:
+61:
+62:
+63:
+64:
+65:
+66:
+67:
+68:
+69:
+70:
+71:
+72:
+73:
+74:
+75:
+76:
+77:
+78:
+79:
+80:
+81:
+82:
+83:
+84:
+85:
+86:
+87:
+88:
+89:
+90:
+91:
+92:
+93:
+94:
+95:
+96:
+97:
+98:
+99:
+100:
+101: XY
+102: Y
+
+/(a*b|(?i:c*(?-i)d))/I
+Capturing subpattern count = 1
+Starting code units: C a b c d
+Subject length lower bound = 1
+
+/()[ab]xyz/I
+Capturing subpattern count = 1
+Starting code units: a b
+Last code unit = 'z'
+Subject length lower bound = 4
+
+/(|)[ab]xyz/I
+Capturing subpattern count = 1
+Starting code units: a b
+Last code unit = 'z'
+Subject length lower bound = 4
+
+/(|c)[ab]xyz/I
+Capturing subpattern count = 1
+Starting code units: a b c
+Last code unit = 'z'
+Subject length lower bound = 4
+
+/(|c?)[ab]xyz/I
+Capturing subpattern count = 1
+Starting code units: a b c
+Last code unit = 'z'
+Subject length lower bound = 4
+
+/(d?|c?)[ab]xyz/I
+Capturing subpattern count = 1
+Starting code units: a b c d
+Last code unit = 'z'
+Subject length lower bound = 4
+
+/(d?|c)[ab]xyz/I
+Capturing subpattern count = 1
+Starting code units: a b c d
+Last code unit = 'z'
+Subject length lower bound = 4
+
+/^a*b\d/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ a*+
+ b
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: a b
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/^a*+b\d/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ a*+
+ b
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: a b
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/^a*?b\d/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ a*+
+ b
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Starting code units: a b
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/^a+A\d/IB
+------------------------------------------------------------------
+ Bra
+ ^
+ a++
+ A
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Last code unit = 'A'
+Subject length lower bound = 3
+ aaaA5
+ 0: aaaA5
+\= Expect no match
+ aaaa5
+No match
+
+/^a*A\d/IBi
+------------------------------------------------------------------
+ Bra
+ ^
+ /i a*
+ /i A
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Compile options: caseless
+Overall options: anchored caseless
+Starting code units: A a
+Last code unit = 'A' (caseless)
+Subject length lower bound = 2
+ aaaA5
+ 0: aaaA5
+ aaaa5
+ 0: aaaa5
+
+/(a*|b*)[cd]/I
+Capturing subpattern count = 1
+Starting code units: a b c d
+Subject length lower bound = 1
+
+/(a+|b*)[cd]/I
+Capturing subpattern count = 1
+Starting code units: a b c d
+Subject length lower bound = 1
+
+/(a*|b+)[cd]/I
+Capturing subpattern count = 1
+Starting code units: a b c d
+Subject length lower bound = 1
+
+/(a+|b+)[cd]/I
+Capturing subpattern count = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
+ ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
+ (((
+ a
+ ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+ ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+ )))
+/Ix
+Capturing subpattern count = 203
+Options: extended
+First code unit = 'a'
+Subject length lower bound = 1
+ large nest
+Matched, but too many substrings
+ 0: a
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+10: a
+11: a
+12: a
+13: a
+14: a
+
+/a*\d/B
+------------------------------------------------------------------
+ Bra
+ a*+
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/a*\D/B
+------------------------------------------------------------------
+ Bra
+ a*
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/0*\d/B
+------------------------------------------------------------------
+ Bra
+ 0*
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/0*\D/B
+------------------------------------------------------------------
+ Bra
+ 0*+
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/a*\s/B
+------------------------------------------------------------------
+ Bra
+ a*+
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/a*\S/B
+------------------------------------------------------------------
+ Bra
+ a*
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/ *\s/B
+------------------------------------------------------------------
+ Bra
+ *
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/ *\S/B
+------------------------------------------------------------------
+ Bra
+ *+
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/a*\w/B
+------------------------------------------------------------------
+ Bra
+ a*
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/a*\W/B
+------------------------------------------------------------------
+ Bra
+ a*+
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/=*\w/B
+------------------------------------------------------------------
+ Bra
+ =*+
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/=*\W/B
+------------------------------------------------------------------
+ Bra
+ =*
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*a/B
+------------------------------------------------------------------
+ Bra
+ \d*+
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*2/B
+------------------------------------------------------------------
+ Bra
+ \d*
+ 2
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\d/B
+------------------------------------------------------------------
+ Bra
+ \d*
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\D/B
+------------------------------------------------------------------
+ Bra
+ \d*+
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\s/B
+------------------------------------------------------------------
+ Bra
+ \d*+
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\S/B
+------------------------------------------------------------------
+ Bra
+ \d*
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\w/B
+------------------------------------------------------------------
+ Bra
+ \d*
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\W/B
+------------------------------------------------------------------
+ Bra
+ \d*+
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*a/B
+------------------------------------------------------------------
+ Bra
+ \D*
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*2/B
+------------------------------------------------------------------
+ Bra
+ \D*+
+ 2
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*\d/B
+------------------------------------------------------------------
+ Bra
+ \D*+
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*\D/B
+------------------------------------------------------------------
+ Bra
+ \D*
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*\s/B
+------------------------------------------------------------------
+ Bra
+ \D*
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*\S/B
+------------------------------------------------------------------
+ Bra
+ \D*
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*\w/B
+------------------------------------------------------------------
+ Bra
+ \D*
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/\D*\W/B
+------------------------------------------------------------------
+ Bra
+ \D*
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*a/B
+------------------------------------------------------------------
+ Bra
+ \s*+
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*2/B
+------------------------------------------------------------------
+ Bra
+ \s*+
+ 2
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*\d/B
+------------------------------------------------------------------
+ Bra
+ \s*+
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*\D/B
+------------------------------------------------------------------
+ Bra
+ \s*
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*\s/B
+------------------------------------------------------------------
+ Bra
+ \s*
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*\S/B
+------------------------------------------------------------------
+ Bra
+ \s*+
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*\w/B
+------------------------------------------------------------------
+ Bra
+ \s*+
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*\W/B
+------------------------------------------------------------------
+ Bra
+ \s*
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*a/B
+------------------------------------------------------------------
+ Bra
+ \S*
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*2/B
+------------------------------------------------------------------
+ Bra
+ \S*
+ 2
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*\d/B
+------------------------------------------------------------------
+ Bra
+ \S*
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*\D/B
+------------------------------------------------------------------
+ Bra
+ \S*
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*\s/B
+------------------------------------------------------------------
+ Bra
+ \S*+
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*\S/B
+------------------------------------------------------------------
+ Bra
+ \S*
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*\w/B
+------------------------------------------------------------------
+ Bra
+ \S*
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S*\W/B
+------------------------------------------------------------------
+ Bra
+ \S*
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*a/B
+------------------------------------------------------------------
+ Bra
+ \w*
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*2/B
+------------------------------------------------------------------
+ Bra
+ \w*
+ 2
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*\d/B
+------------------------------------------------------------------
+ Bra
+ \w*
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*\D/B
+------------------------------------------------------------------
+ Bra
+ \w*
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*\s/B
+------------------------------------------------------------------
+ Bra
+ \w*+
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*\S/B
+------------------------------------------------------------------
+ Bra
+ \w*
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*\w/B
+------------------------------------------------------------------
+ Bra
+ \w*
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w*\W/B
+------------------------------------------------------------------
+ Bra
+ \w*+
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*a/B
+------------------------------------------------------------------
+ Bra
+ \W*+
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*2/B
+------------------------------------------------------------------
+ Bra
+ \W*+
+ 2
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*\d/B
+------------------------------------------------------------------
+ Bra
+ \W*+
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*\D/B
+------------------------------------------------------------------
+ Bra
+ \W*
+ \D
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*\s/B
+------------------------------------------------------------------
+ Bra
+ \W*
+ \s
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*\S/B
+------------------------------------------------------------------
+ Bra
+ \W*
+ \S
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*\w/B
+------------------------------------------------------------------
+ Bra
+ \W*+
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W*\W/B
+------------------------------------------------------------------
+ Bra
+ \W*
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^a]+a/B
+------------------------------------------------------------------
+ Bra
+ [^a]++
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^a]+a/Bi
+------------------------------------------------------------------
+ Bra
+ /i [^a]++
+ /i a
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^a]+A/Bi
+------------------------------------------------------------------
+ Bra
+ /i [^a]++
+ /i A
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^a]+b/B
+------------------------------------------------------------------
+ Bra
+ [^a]+
+ b
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^a]+\d/B
+------------------------------------------------------------------
+ Bra
+ [^a]+
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/a*[^a]/B
+------------------------------------------------------------------
+ Bra
+ a*+
+ [^a]
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?P<abc>x)(?P<xyz>y)/I
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ abc 1
+ xyz 2
+First code unit = 'x'
+Last code unit = 'y'
+Subject length lower bound = 2
+ xy\=copy=abc,copy=xyz
+ 0: xy
+ 1: x
+ 2: y
+ C x (1) abc (group 1)
+ C y (1) xyz (group 2)
+
+/(?<abc>x)(?'xyz'y)/I
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ abc 1
+ xyz 2
+First code unit = 'x'
+Last code unit = 'y'
+Subject length lower bound = 2
+ xy\=copy=abc,copy=xyz
+ 0: xy
+ 1: x
+ 2: y
+ C x (1) abc (group 1)
+ C y (1) xyz (group 2)
+
+/(?<abc'x)(?'xyz'y)/I
+Failed: error 142 at offset 6: syntax error in subpattern name (missing terminator)
+
+/(?<abc>x)(?'xyz>y)/I
+Failed: error 142 at offset 15: syntax error in subpattern name (missing terminator)
+
+/(?P'abc'x)(?P<xyz>y)/I
+Failed: error 141 at offset 3: unrecognized character after (?P
+
+/^(?:(?(ZZ)a|b)(?<ZZ>X))+/
+ bXaX
+ 0: bXaX
+ 1: X
+ bXbX
+ 0: bX
+ 1: X
+\= Expect no match
+ aXaX
+No match
+ aXbX
+No match
+
+/^(?P>abc)(?<abcd>xxx)/
+Failed: error 115 at offset 5: reference to non-existent subpattern
+
+/^(?P>abc)(?<abc>x|y)/
+ xx
+ 0: xx
+ 1: x
+ xy
+ 0: xy
+ 1: y
+ yy
+ 0: yy
+ 1: y
+ yx
+ 0: yx
+ 1: x
+
+/^(?P>abc)(?P<abc>x|y)/
+ xx
+ 0: xx
+ 1: x
+ xy
+ 0: xy
+ 1: y
+ yy
+ 0: yy
+ 1: y
+ yx
+ 0: yx
+ 1: x
+
+/^((?(abc)a|b)(?<abc>x|y))+/
+ bxay
+ 0: bxay
+ 1: ay
+ 2: y
+ bxby
+ 0: bx
+ 1: bx
+ 2: x
+\= Expect no match
+ axby
+No match
+
+/^(((?P=abc)|X)(?<abc>x|y))+/
+ XxXxxx
+ 0: XxXxxx
+ 1: xx
+ 2: x
+ 3: x
+ XxXyyx
+ 0: XxXyyx
+ 1: yx
+ 2: y
+ 3: x
+ XxXyxx
+ 0: XxXy
+ 1: Xy
+ 2: X
+ 3: y
+\= Expect no match
+ x
+No match
+
+/^(?1)(abc)/
+ abcabc
+ 0: abcabc
+ 1: abc
+
+/^(?:(?:\1|X)(a|b))+/
+ Xaaa
+ 0: Xaaa
+ 1: a
+ Xaba
+ 0: Xa
+ 1: a
+
+/^[\E\Qa\E-\Qz\E]+/B
+------------------------------------------------------------------
+ Bra
+ ^
+ [a-z]++
+ Ket
+ End
+------------------------------------------------------------------
+
+/^[a\Q]bc\E]/B
+------------------------------------------------------------------
+ Bra
+ ^
+ [\]a-c]
+ Ket
+ End
+------------------------------------------------------------------
+
+/^[a-\Q\E]/B
+------------------------------------------------------------------
+ Bra
+ ^
+ [\-a]
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?P>abc)[()](?<abc>)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Recurse
+ [()]
+ CBra 1
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/^((?(abc)y)[()](?P<abc>x))+/B
+------------------------------------------------------------------
+ Bra
+ ^
+ CBra 1
+ Cond
+ 2 Cond ref
+ y
+ Ket
+ [()]
+ CBra 2
+ x
+ Ket
+ KetRmax
+ Ket
+ End
+------------------------------------------------------------------
+ (xy)x
+ 0: (xy)x
+ 1: y)x
+ 2: x
+
+/^(?P>abc)\Q()\E(?<abc>)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Recurse
+ ()
+ CBra 1
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?P>abc)[a\Q(]\E(](?<abc>)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Recurse
+ [(\]a]
+ CBra 1
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?P>abc) # this is (a comment)
+ (?<abc>)/Bx
+------------------------------------------------------------------
+ Bra
+ ^
+ Recurse
+ CBra 1
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/^\W*(?:(?<one>(?<two>.)\W*(?&one)\W*\k<two>|)|(?<three>(?<four>.)\W*(?&three)\W*\k'four'|\W*.\W*))\W*$/Ii
+Capturing subpattern count = 4
+Max back reference = 4
+Named capturing subpatterns:
+ four 4
+ one 1
+ three 3
+ two 2
+May match empty string
+Compile options: caseless
+Overall options: anchored caseless
+Subject length lower bound = 0
+ 1221
+ 0: 1221
+ 1: 1221
+ 2: 1
+ Satan, oscillate my metallic sonatas!
+ 0: Satan, oscillate my metallic sonatas!
+ 1: <unset>
+ 2: <unset>
+ 3: Satan, oscillate my metallic sonatas
+ 4: S
+ A man, a plan, a canal: Panama!
+ 0: A man, a plan, a canal: Panama!
+ 1: <unset>
+ 2: <unset>
+ 3: A man, a plan, a canal: Panama
+ 4: A
+ Able was I ere I saw Elba.
+ 0: Able was I ere I saw Elba.
+ 1: <unset>
+ 2: <unset>
+ 3: Able was I ere I saw Elba
+ 4: A
+\= Expect no match
+ The quick brown fox
+No match
+
+/(?=(\w+))\1:/I
+Capturing subpattern count = 1
+Max back reference = 1
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P
+ Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Last code unit = ':'
+Subject length lower bound = 2
+ abcd:
+ 0: abcd:
+ 1: abcd
+
+/(?=(?'abc'\w+))\k<abc>:/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ abc 1
+Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P
+ Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+Last code unit = ':'
+Subject length lower bound = 2
+ abcd:
+ 0: abcd:
+ 1: abcd
+
+/(?'abc'a|b)(?<abc>d|e)\k<abc>{2}/dupnames
+ adaa
+ 0: adaa
+ 1: a
+ 2: d
+\= Expect no match
+ addd
+No match
+ adbb
+No match
+
+/(?'abc'a|b)(?<abc>d|e)(?&abc){2}/dupnames
+ bdaa
+ 0: bdaa
+ 1: b
+ 2: d
+ bdab
+ 0: bdab
+ 1: b
+ 2: d
+\= Expect no match
+ bddd
+No match
+
+/(?(<bc))/
+Failed: error 142 at offset 6: syntax error in subpattern name (missing terminator)
+
+/(?(''))/
+Failed: error 162 at offset 4: subpattern name expected
+
+/(?('R')stuff)/
+Failed: error 115 at offset 4: reference to non-existent subpattern
+
+/((abc (?(R) (?(R1)1) (?(R2)2) X | (?1) (?2) (?R) ))) /x
+ abcabc1Xabc2XabcXabcabc
+ 0: abcabc1Xabc2XabcX
+ 1: abcabc1Xabc2XabcX
+ 2: abcabc1Xabc2XabcX
+
+/(?<A> (?'B' abc (?(R) (?(R&A)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
+ abcabc1Xabc2XabcXabcabc
+ 0: abcabc1Xabc2XabcX
+ 1: abcabc1Xabc2XabcX
+ 2: abcabc1Xabc2XabcX
+
+/(?<A> (?'B' abc (?(R) (?(R&C)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
+Failed: error 115 at offset 27: reference to non-existent subpattern
+
+/^(?(DEFINE) abc | xyz ) /x
+Failed: error 154 at offset 4: DEFINE group contains more than one branch
+
+/(?(DEFINE) abc) xyz/Ix
+Capturing subpattern count = 0
+Options: extended
+First code unit = 'x'
+Last code unit = 'z'
+Subject length lower bound = 3
+
+/(a|)*\d/
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4\=ovector=0
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
+ 1:
+\= Expect no match
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\=ovector=0
+No match
+
+/^a.b/newline=lf
+ a\rb
+ 0: a\x0db
+\= Expect no match
+ a\nb
+No match
+
+/^a.b/newline=cr
+ a\nb
+ 0: a\x0ab
+\= Expect no match
+ a\rb
+No match
+
+/^a.b/newline=anycrlf
+ a\x85b
+ 0: a\x85b
+\= Expect no match
+ a\rb
+No match
+
+/^a.b/newline=any
+\= Expect no match
+ a\nb
+No match
+ a\rb
+No match
+ a\x85b
+No match
+
+/^abc./gmx,newline=any
+ abc1 \x0aabc2 \x0babc3xx \x0cabc4 \x0dabc5xx \x0d\x0aabc6 \x85abc7 JUNK
+ 0: abc1
+ 0: abc2
+ 0: abc3
+ 0: abc4
+ 0: abc5
+ 0: abc6
+ 0: abc7
+
+/abc.$/gmx,newline=any
+ abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc7 abc9
+ 0: abc1
+ 0: abc2
+ 0: abc3
+ 0: abc4
+ 0: abc5
+ 0: abc6
+ 0: abc9
+
+/^a\Rb/bsr=unicode
+ a\nb
+ 0: a\x0ab
+ a\rb
+ 0: a\x0db
+ a\r\nb
+ 0: a\x0d\x0ab
+ a\x0bb
+ 0: a\x0bb
+ a\x0cb
+ 0: a\x0cb
+ a\x85b
+ 0: a\x85b
+\= Expect no match
+ a\n\rb
+No match
+
+/^a\R*b/bsr=unicode
+ ab
+ 0: ab
+ a\nb
+ 0: a\x0ab
+ a\rb
+ 0: a\x0db
+ a\r\nb
+ 0: a\x0d\x0ab
+ a\x0bb
+ 0: a\x0bb
+ a\x0cb
+ 0: a\x0cb
+ a\x85b
+ 0: a\x85b
+ a\n\rb
+ 0: a\x0a\x0db
+ a\n\r\x85\x0cb
+ 0: a\x0a\x0d\x85\x0cb
+
+/^a\R+b/bsr=unicode
+ a\nb
+ 0: a\x0ab
+ a\rb
+ 0: a\x0db
+ a\r\nb
+ 0: a\x0d\x0ab
+ a\x0bb
+ 0: a\x0bb
+ a\x0cb
+ 0: a\x0cb
+ a\x85b
+ 0: a\x85b
+ a\n\rb
+ 0: a\x0a\x0db
+ a\n\r\x85\x0cb
+ 0: a\x0a\x0d\x85\x0cb
+\= Expect no match
+ ab
+No match
+
+/^a\R{1,3}b/bsr=unicode
+ a\nb
+ 0: a\x0ab
+ a\n\rb
+ 0: a\x0a\x0db
+ a\n\r\x85b
+ 0: a\x0a\x0d\x85b
+ a\r\n\r\nb
+ 0: a\x0d\x0a\x0d\x0ab
+ a\r\n\r\n\r\nb
+ 0: a\x0d\x0a\x0d\x0a\x0d\x0ab
+ a\n\r\n\rb
+ 0: a\x0a\x0d\x0a\x0db
+ a\n\n\r\nb
+ 0: a\x0a\x0a\x0d\x0ab
+\= Expect no match
+ a\n\n\n\rb
+No match
+ a\r
+No match
+
+/(?&abc)X(?<abc>P)/I
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ abc 1
+Last code unit = 'P'
+Subject length lower bound = 3
+ abcPXP123
+ 0: PXP
+ 1: P
+
+/(?1)X(?<abc>P)/I
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ abc 1
+Last code unit = 'P'
+Subject length lower bound = 3
+ abcPXP123
+ 0: PXP
+ 1: P
+
+/(?:a(?&abc)b)*(?<abc>x)/
+ 123axbaxbaxbx456
+ 0: axbaxbaxbx
+ 1: x
+ 123axbaxbaxb456
+ 0: x
+ 1: x
+
+/(?:a(?&abc)b){1,5}(?<abc>x)/
+ 123axbaxbaxbx456
+ 0: axbaxbaxbx
+ 1: x
+
+/(?:a(?&abc)b){2,5}(?<abc>x)/
+ 123axbaxbaxbx456
+ 0: axbaxbaxbx
+ 1: x
+
+/(?:a(?&abc)b){2,}(?<abc>x)/
+ 123axbaxbaxbx456
+ 0: axbaxbaxbx
+ 1: x
+
+/(abc)(?i:(?1))/
+ defabcabcxyz
+ 0: abcabc
+ 1: abc
+\= Expect no match
+ DEFabcABCXYZ
+No match
+
+/(abc)(?:(?i)(?1))/
+ defabcabcxyz
+ 0: abcabc
+ 1: abc
+\= Expect no match
+ DEFabcABCXYZ
+No match
+
+/^(a)\g-2/
+Failed: error 115 at offset 8: reference to non-existent subpattern
+
+/^(a)\g/
+Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/^(a)\g{0}/
+Failed: error 115 at offset 9: reference to non-existent subpattern
+
+/^(a)\g{3/
+Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/^(a)\g{aa}/
+Failed: error 115 at offset 7: reference to non-existent subpattern
+
+/^a.b/newline=lf
+ a\rb
+ 0: a\x0db
+\= Expect no match
+ a\nb
+No match
+
+/.+foo/
+ afoo
+ 0: afoo
+\= Expect no match
+ \r\nfoo
+No match
+ \nfoo
+No match
+
+/.+foo/newline=crlf
+ afoo
+ 0: afoo
+ \nfoo
+ 0: \x0afoo
+\= Expect no match
+ \r\nfoo
+No match
+
+/.+foo/newline=any
+ afoo
+ 0: afoo
+\= Expect no match
+ \nfoo
+No match
+ \r\nfoo
+No match
+
+/.+foo/s
+ afoo
+ 0: afoo
+ \r\nfoo
+ 0: \x0d\x0afoo
+ \nfoo
+ 0: \x0afoo
+
+/^$/gm,newline=any
+ abc\r\rxyz
+ 0:
+ abc\n\rxyz
+ 0:
+\= Expect no match
+ abc\r\nxyz
+No match
+
+/(?m)^$/g,newline=any,aftertext
+ abc\r\n\r\n
+ 0:
+ 0+ \x0d\x0a
+
+/(?m)^$|^\r\n/g,newline=any,aftertext
+ abc\r\n\r\n
+ 0:
+ 0+ \x0d\x0a
+ 0: \x0d\x0a
+ 0+
+
+/(?m)$/g,newline=any,aftertext
+ abc\r\n\r\n
+ 0:
+ 0+ \x0d\x0a\x0d\x0a
+ 0:
+ 0+ \x0d\x0a
+ 0:
+ 0+
+
+/abc.$/gmx,newline=anycrlf
+ abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc9
+ 0: abc1
+ 0: abc4
+ 0: abc5
+ 0: abc9
+
+/^X/m
+ XABC
+ 0: X
+\= Expect no match
+ XABC\=notbol
+No match
+
+/(ab|c)(?-1)/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ ab
+ Alt
+ c
+ Ket
+ Recurse
+ Ket
+ End
+------------------------------------------------------------------
+ abc
+ 0: abc
+ 1: ab
+
+/xy(?+1)(abc)/B
+------------------------------------------------------------------
+ Bra
+ xy
+ Recurse
+ CBra 1
+ abc
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ xyabcabc
+ 0: xyabcabc
+ 1: abc
+\= Expect no match
+ xyabc
+No match
+
+/x(?-0)y/
+Failed: error 126 at offset 5: a relative value of zero is not allowed
+
+/x(?-1)y/
+Failed: error 115 at offset 5: reference to non-existent subpattern
+
+/x(?+0)y/
+Failed: error 126 at offset 5: a relative value of zero is not allowed
+
+/x(?+1)y/
+Failed: error 115 at offset 5: reference to non-existent subpattern
+
+/^(abc)?(?(-1)X|Y)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Brazero
+ CBra 1
+ abc
+ Ket
+ Cond
+ 1 Cond ref
+ X
+ Alt
+ Y
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ abcX
+ 0: abcX
+ 1: abc
+ Y
+ 0: Y
+\= Expect no match
+ abcY
+No match
+
+/^((?(+1)X|Y)(abc))+/B
+------------------------------------------------------------------
+ Bra
+ ^
+ CBra 1
+ Cond
+ 2 Cond ref
+ X
+ Alt
+ Y
+ Ket
+ CBra 2
+ abc
+ Ket
+ KetRmax
+ Ket
+ End
+------------------------------------------------------------------
+ YabcXabc
+ 0: YabcXabc
+ 1: Xabc
+ 2: abc
+ YabcXabcXabc
+ 0: YabcXabcXabc
+ 1: Xabc
+ 2: abc
+\= Expect no match
+ XabcXabc
+No match
+
+/(?(-1)a)/B
+Failed: error 115 at offset 5: reference to non-existent subpattern
+
+/((?(-1)a))/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ Cond
+ 1 Cond ref
+ a
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/((?(-2)a))/B
+Failed: error 115 at offset 6: reference to non-existent subpattern
+
+/^(?(+1)X|Y)(.)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Cond
+ 1 Cond ref
+ X
+ Alt
+ Y
+ Ket
+ CBra 1
+ Any
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ Y!
+ 0: Y!
+ 1: !
+
+/(?<A>tom|bon)-\k{A}/
+ tom-tom
+ 0: tom-tom
+ 1: tom
+ bon-bon
+ 0: bon-bon
+ 1: bon
+\= Expect no match
+ tom-bon
+No match
+
+/\g{A/
+Failed: error 142 at offset 4: syntax error in subpattern name (missing terminator)
+
+/(?|(abc)|(xyz))/B
+------------------------------------------------------------------
+ Bra
+ Bra
+ CBra 1
+ abc
+ Ket
+ Alt
+ CBra 1
+ xyz
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ >abc<
+ 0: abc
+ 1: abc
+ >xyz<
+ 0: xyz
+ 1: xyz
+
+/(x)(?|(abc)|(xyz))(x)/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ x
+ Ket
+ Bra
+ CBra 2
+ abc
+ Ket
+ Alt
+ CBra 2
+ xyz
+ Ket
+ Ket
+ CBra 3
+ x
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ xabcx
+ 0: xabcx
+ 1: x
+ 2: abc
+ 3: x
+ xxyzx
+ 0: xxyzx
+ 1: x
+ 2: xyz
+ 3: x
+
+/(x)(?|(abc)(pqr)|(xyz))(x)/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ x
+ Ket
+ Bra
+ CBra 2
+ abc
+ Ket
+ CBra 3
+ pqr
+ Ket
+ Alt
+ CBra 2
+ xyz
+ Ket
+ Ket
+ CBra 4
+ x
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ xabcpqrx
+ 0: xabcpqrx
+ 1: x
+ 2: abc
+ 3: pqr
+ 4: x
+ xxyzx
+ 0: xxyzx
+ 1: x
+ 2: xyz
+ 3: <unset>
+ 4: x
+
+/\H++X/B
+------------------------------------------------------------------
+ Bra
+ \H++
+ X
+ Ket
+ End
+------------------------------------------------------------------
+\= Expect no match
+ XXXX
+No match
+
+/\H+\hY/B
+------------------------------------------------------------------
+ Bra
+ \H++
+ \h
+ Y
+ Ket
+ End
+------------------------------------------------------------------
+ XXXX Y
+ 0: XXXX Y
+
+/\H+ Y/B
+------------------------------------------------------------------
+ Bra
+ \H++
+ Y
+ Ket
+ End
+------------------------------------------------------------------
+
+/\h+A/B
+------------------------------------------------------------------
+ Bra
+ \h++
+ A
+ Ket
+ End
+------------------------------------------------------------------
+
+/\v*B/B
+------------------------------------------------------------------
+ Bra
+ \v*+
+ B
+ Ket
+ End
+------------------------------------------------------------------
+
+/\V+\x0a/B
+------------------------------------------------------------------
+ Bra
+ \V++
+ \x0a
+ Ket
+ End
+------------------------------------------------------------------
+
+/A+\h/B
+------------------------------------------------------------------
+ Bra
+ A++
+ \h
+ Ket
+ End
+------------------------------------------------------------------
+
+/ *\H/B
+------------------------------------------------------------------
+ Bra
+ *+
+ \H
+ Ket
+ End
+------------------------------------------------------------------
+
+/A*\v/B
+------------------------------------------------------------------
+ Bra
+ A*+
+ \v
+ Ket
+ End
+------------------------------------------------------------------
+
+/\x0b*\V/B
+------------------------------------------------------------------
+ Bra
+ \x0b*+
+ \V
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d+\h/B
+------------------------------------------------------------------
+ Bra
+ \d++
+ \h
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\v/B
+------------------------------------------------------------------
+ Bra
+ \d*+
+ \v
+ Ket
+ End
+------------------------------------------------------------------
+
+/S+\h\S+\v/B
+------------------------------------------------------------------
+ Bra
+ S++
+ \h
+ \S++
+ \v
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w{3,}\h\w+\v/B
+------------------------------------------------------------------
+ Bra
+ \w{3}
+ \w*+
+ \h
+ \w++
+ \v
+ Ket
+ End
+------------------------------------------------------------------
+
+/\h+\d\h+\w\h+\S\h+\H/B
+------------------------------------------------------------------
+ Bra
+ \h++
+ \d
+ \h++
+ \w
+ \h++
+ \S
+ \h++
+ \H
+ Ket
+ End
+------------------------------------------------------------------
+
+/\v+\d\v+\w\v+\S\v+\V/B
+------------------------------------------------------------------
+ Bra
+ \v++
+ \d
+ \v++
+ \w
+ \v++
+ \S
+ \v++
+ \V
+ Ket
+ End
+------------------------------------------------------------------
+
+/\H+\h\H+\d/B
+------------------------------------------------------------------
+ Bra
+ \H++
+ \h
+ \H+
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\V+\v\V+\w/B
+------------------------------------------------------------------
+ Bra
+ \V++
+ \v
+ \V+
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+
+/\( (?: [^()]* | (?R) )* \)/x
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+
+/[\E]AAA/
+Failed: error 106 at offset 7: missing terminating ] for character class
+
+/[\Q\E]AAA/
+Failed: error 106 at offset 9: missing terminating ] for character class
+
+/[^\E]AAA/
+Failed: error 106 at offset 8: missing terminating ] for character class
+
+/[^\Q\E]AAA/
+Failed: error 106 at offset 10: missing terminating ] for character class
+
+/[\E^]AAA/
+Failed: error 106 at offset 8: missing terminating ] for character class
+
+/[\Q\E^]AAA/
+Failed: error 106 at offset 10: missing terminating ] for character class
+
+/A(*PRUNE)B(*SKIP)C(*THEN)D(*COMMIT)E(*F)F(*FAIL)G(?!)H(*ACCEPT)I/B
+------------------------------------------------------------------
+ Bra
+ A
+ *PRUNE
+ B
+ *SKIP
+ C
+ *THEN
+ D
+ *COMMIT
+ E
+ *FAIL
+ F
+ *FAIL
+ G
+ *FAIL
+ H
+ *ACCEPT
+ I
+ Ket
+ End
+------------------------------------------------------------------
+
+/^a+(*FAIL)/auto_callout
+\= Expect no match
+ aaaaaa
+--->aaaaaa
+ +0 ^ ^
+ +1 ^ a+
+ +3 ^ ^ (*FAIL)
+ +3 ^ ^ (*FAIL)
+ +3 ^ ^ (*FAIL)
+ +3 ^ ^ (*FAIL)
+ +3 ^ ^ (*FAIL)
+ +3 ^^ (*FAIL)
+No match
+
+/a+b?c+(*FAIL)/auto_callout
+\= Expect no match
+ aaabccc
+--->aaabccc
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ c+
+ +6 ^ ^ (*FAIL)
+ +6 ^ ^ (*FAIL)
+ +6 ^ ^ (*FAIL)
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ c+
+ +6 ^ ^ (*FAIL)
+ +6 ^ ^ (*FAIL)
+ +6 ^ ^ (*FAIL)
+ +0 ^ a+
+ +2 ^^ b?
+ +4 ^ ^ c+
+ +6 ^ ^ (*FAIL)
+ +6 ^ ^ (*FAIL)
+ +6 ^ ^ (*FAIL)
+No match
+
+/a+b?(*PRUNE)c+(*FAIL)/auto_callout
+\= Expect no match
+ aaabccc
+--->aaabccc
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ (*PRUNE)
++12 ^ ^ c+
++14 ^ ^ (*FAIL)
++14 ^ ^ (*FAIL)
++14 ^ ^ (*FAIL)
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ (*PRUNE)
++12 ^ ^ c+
++14 ^ ^ (*FAIL)
++14 ^ ^ (*FAIL)
++14 ^ ^ (*FAIL)
+ +0 ^ a+
+ +2 ^^ b?
+ +4 ^ ^ (*PRUNE)
++12 ^ ^ c+
++14 ^ ^ (*FAIL)
++14 ^ ^ (*FAIL)
++14 ^ ^ (*FAIL)
+No match
+
+/a+b?(*COMMIT)c+(*FAIL)/auto_callout
+\= Expect no match
+ aaabccc
+--->aaabccc
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ (*COMMIT)
++13 ^ ^ c+
++15 ^ ^ (*FAIL)
++15 ^ ^ (*FAIL)
++15 ^ ^ (*FAIL)
+No match
+
+/a+b?(*SKIP)c+(*FAIL)/auto_callout
+\= Expect no match
+ aaabcccaaabccc
+--->aaabcccaaabccc
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ (*SKIP)
++11 ^ ^ c+
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ (*SKIP)
++11 ^ ^ c+
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
+No match
+
+/a+b?(*THEN)c+(*FAIL)/auto_callout
+\= Expect no match
+ aaabccc
+--->aaabccc
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ (*THEN)
++11 ^ ^ c+
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
+ +0 ^ a+
+ +2 ^ ^ b?
+ +4 ^ ^ (*THEN)
++11 ^ ^ c+
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
+ +0 ^ a+
+ +2 ^^ b?
+ +4 ^ ^ (*THEN)
++11 ^ ^ c+
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
++13 ^ ^ (*FAIL)
+No match
+
+/a(*MARK)b/
+Failed: error 166 at offset 7: (*MARK) must have an argument
+
+/(?i:A{1,}\6666666666)/
+Failed: error 161 at offset 19: group number is too big
+
+/\g6666666666/
+Failed: error 161 at offset 7: group number is too big
+
+/[\g6666666666]/B
+------------------------------------------------------------------
+ Bra
+ [6g]
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?1)\c[/
+Failed: error 115 at offset 3: reference to non-existent subpattern
+
+/.+A/newline=crlf
+\= Expect no match
+ \r\nA
+No match
+
+/\nA/newline=crlf
+ \r\nA
+ 0: \x0aA
+
+/[\r\n]A/newline=crlf
+ \r\nA
+ 0: \x0aA
+
+/(\r|\n)A/newline=crlf
+ \r\nA
+ 0: \x0aA
+ 1: \x0a
+
+/a(*CR)b/
+Failed: error 160 at offset 5: (*VERB) not recognized or malformed
+
+/(*CR)a.b/
+ a\nb
+ 0: a\x0ab
+\= Expect no match
+ a\rb
+No match
+
+/(*CR)a.b/newline=lf
+ a\nb
+ 0: a\x0ab
+\= Expect no match
+ a\rb
+No match
+
+/(*LF)a.b/newline=CRLF
+ a\rb
+ 0: a\x0db
+\= Expect no match
+ a\nb
+No match
+
+/(*CRLF)a.b/
+ a\rb
+ 0: a\x0db
+ a\nb
+ 0: a\x0ab
+\= Expect no match
+ a\r\nb
+No match
+
+/(*ANYCRLF)a.b/newline=CR
+\= Expect no match
+ a\rb
+No match
+ a\nb
+No match
+ a\r\nb
+No match
+
+/(*ANY)a.b/newline=cr
+\= Expect no match
+ a\rb
+No match
+ a\nb
+No match
+ a\r\nb
+No match
+ a\x85b
+No match
+
+/(*ANY).*/g
+ abc\r\ndef
+ 0: abc
+ 0:
+ 0: def
+ 0:
+
+/(*ANYCRLF).*/g
+ abc\r\ndef
+ 0: abc
+ 0:
+ 0: def
+ 0:
+
+/(*CRLF).*/g
+ abc\r\ndef
+ 0: abc
+ 0:
+ 0: def
+ 0:
+
+/(*NUL)^.*/
+ a\nb\x00ccc
+ 0: a\x0ab
+
+/(*NUL)^.*/s
+ a\nb\x00ccc
+ 0: a\x0ab\x00ccc
+
+/^x/m,newline=NUL
+ ab\x00xy
+ 0: x
+
+/'#comment' 0d 0a 00 '^x\' 0a 'y'/x,newline=nul,hex
+ x\nyz
+ 0: x\x0ay
+
+/(*NUL)^X\NY/
+ X\nY
+ 0: X\x0aY
+ X\rY
+ 0: X\x0dY
+\= Expect no match
+ X\x00Y
+No match
+
+/a\Rb/I,bsr=anycrlf
+Capturing subpattern count = 0
+\R matches CR, LF, or CRLF
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+ a\rb
+ 0: a\x0db
+ a\nb
+ 0: a\x0ab
+ a\r\nb
+ 0: a\x0d\x0ab
+\= Expect no match
+ a\x85b
+No match
+ a\x0bb
+No match
+
+/a\Rb/I,bsr=unicode
+Capturing subpattern count = 0
+\R matches any Unicode newline
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+ a\rb
+ 0: a\x0db
+ a\nb
+ 0: a\x0ab
+ a\r\nb
+ 0: a\x0d\x0ab
+ a\x85b
+ 0: a\x85b
+ a\x0bb
+ 0: a\x0bb
+
+/a\R?b/I,bsr=anycrlf
+Capturing subpattern count = 0
+\R matches CR, LF, or CRLF
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ a\rb
+ 0: a\x0db
+ a\nb
+ 0: a\x0ab
+ a\r\nb
+ 0: a\x0d\x0ab
+\= Expect no match
+ a\x85b
+No match
+ a\x0bb
+No match
+
+/a\R?b/I,bsr=unicode
+Capturing subpattern count = 0
+\R matches any Unicode newline
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ a\rb
+ 0: a\x0db
+ a\nb
+ 0: a\x0ab
+ a\r\nb
+ 0: a\x0d\x0ab
+ a\x85b
+ 0: a\x85b
+ a\x0bb
+ 0: a\x0bb
+
+/a\R{2,4}b/I,bsr=anycrlf
+Capturing subpattern count = 0
+\R matches CR, LF, or CRLF
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 4
+ a\r\n\nb
+ 0: a\x0d\x0a\x0ab
+ a\n\r\rb
+ 0: a\x0a\x0d\x0db
+ a\r\n\r\n\r\n\r\nb
+ 0: a\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0ab
+\= Expect no match
+ a\x85\x85b
+No match
+ a\x0b\x0bb
+No match
+
+/a\R{2,4}b/I,bsr=unicode
+Capturing subpattern count = 0
+\R matches any Unicode newline
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 4
+ a\r\rb
+ 0: a\x0d\x0db
+ a\n\n\nb
+ 0: a\x0a\x0a\x0ab
+ a\r\n\n\r\rb
+ 0: a\x0d\x0a\x0a\x0d\x0db
+ a\x85\x85b
+ 0: a\x85\x85b
+ a\x0b\x0bb
+ 0: a\x0b\x0bb
+\= Expect no match
+ a\r\r\r\r\rb
+No match
+
+/(*BSR_ANYCRLF)a\Rb/I
+Capturing subpattern count = 0
+\R matches CR, LF, or CRLF
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+ a\nb
+ 0: a\x0ab
+ a\rb
+ 0: a\x0db
+
+/(*BSR_UNICODE)a\Rb/I
+Capturing subpattern count = 0
+\R matches any Unicode newline
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+ a\x85b
+ 0: a\x85b
+
+/(*BSR_ANYCRLF)(*CRLF)a\Rb/I
+Capturing subpattern count = 0
+\R matches CR, LF, or CRLF
+Forced newline is CRLF
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+ a\nb
+ 0: a\x0ab
+ a\rb
+ 0: a\x0db
+
+/(*CRLF)(*BSR_UNICODE)a\Rb/I
+Capturing subpattern count = 0
+\R matches any Unicode newline
+Forced newline is CRLF
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 3
+ a\x85b
+ 0: a\x85b
+
+/(*CRLF)(*BSR_ANYCRLF)(*CR)ab/I
+Capturing subpattern count = 0
+\R matches CR, LF, or CRLF
+Forced newline is CR
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?<a>)(?&)/
+Failed: error 162 at offset 9: subpattern name expected
+
+/(?<abc>)(?&a)/
+Failed: error 115 at offset 11: reference to non-existent subpattern
+
+/(?<a>)(?&aaaaaaaaaaaaaaaaaaaaaaa)/
+Failed: error 115 at offset 9: reference to non-existent subpattern
+
+/(?+-a)/
+Failed: error 129 at offset 2: digit expected after (?+ or (?-
+
+/(?-+a)/
+Failed: error 111 at offset 3: unrecognized character after (? or (?-
+
+/(?(-1))/
+Failed: error 115 at offset 5: reference to non-existent subpattern
+
+/(?(+10))/
+Failed: error 115 at offset 4: reference to non-existent subpattern
+
+/(?(10))/
+Failed: error 115 at offset 3: reference to non-existent subpattern
+
+/(?(+2))()()/
+
+/(?(2))()()/
+
+/\k''/
+Failed: error 162 at offset 3: subpattern name expected
+
+/\k<>/
+Failed: error 162 at offset 3: subpattern name expected
+
+/\k{}/
+Failed: error 162 at offset 3: subpattern name expected
+
+/\k/
+Failed: error 169 at offset 2: \k is not followed by a braced, angle-bracketed, or quoted name
+
+/\kabc/
+Failed: error 169 at offset 2: \k is not followed by a braced, angle-bracketed, or quoted name
+
+/(?P=)/
+Failed: error 162 at offset 4: subpattern name expected
+
+/(?P>)/
+Failed: error 162 at offset 4: subpattern name expected
+
+/[[:foo:]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[[:1234:]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[[:f\oo:]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[[: :]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[[:...:]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[[:l\ower:]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[[:abc\:]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/[abc[:x\]pqr:]]/
+Failed: error 130 at offset 6: unknown POSIX class name
+
+/[[:a\dz:]]/
+Failed: error 130 at offset 3: unknown POSIX class name
+
+/(^(a|b\g<-1'c))/
+Failed: error 157 at offset 8: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/^(?+1)(?<a>x|y){0}z/
+ xzxx
+ 0: xz
+ yzyy
+ 0: yz
+\= Expect no match
+ xxz
+No match
+
+/(\3)(\1)(a)/
+\= Expect no match
+ cat
+No match
+
+/(\3)(\1)(a)/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ cat
+ 0: a
+ 1:
+ 2:
+ 3: a
+
+/TA]/
+ The ACTA] comes
+ 0: TA]
+
+/TA]/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ The ACTA] comes
+ 0: TA]
+
+/(?2)[]a()b](abc)/
+Failed: error 115 at offset 3: reference to non-existent subpattern
+ abcbabc
+
+/(?2)[^]a()b](abc)/
+Failed: error 115 at offset 3: reference to non-existent subpattern
+ abcbabc
+
+/(?1)[]a()b](abc)/
+ abcbabc
+ 0: abcbabc
+ 1: abc
+\= Expect no match
+ abcXabc
+No match
+
+/(?1)[^]a()b](abc)/
+ abcXabc
+ 0: abcXabc
+ 1: abc
+\= Expect no match
+ abcbabc
+No match
+
+/(?2)[]a()b](abc)(xyz)/
+ xyzbabcxyz
+ 0: xyzbabcxyz
+ 1: abc
+ 2: xyz
+
+/(?&N)[]a(?<N>)](?<M>abc)/
+Failed: error 115 at offset 3: reference to non-existent subpattern
+ abc<abc
+
+/(?&N)[]a(?<N>)](abc)/
+Failed: error 115 at offset 3: reference to non-existent subpattern
+ abc<abc
+
+/a[]b/
+Failed: error 106 at offset 4: missing terminating ] for character class
+
+/a[^]b/
+Failed: error 106 at offset 5: missing terminating ] for character class
+
+/a[]b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+\= Expect no match
+ ab
+No match
+
+/a[]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+\= Expect no match
+ ab
+No match
+
+/a[]*+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+\= Expect no match
+ ab
+No match
+
+/a[^]b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ aXb
+ 0: aXb
+ a\nb
+ 0: a\x0ab
+\= Expect no match
+ ab
+No match
+
+/a[^]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ aXb
+ 0: aXb
+ a\nX\nXb
+ 0: a\x0aX\x0aXb
+\= Expect no match
+ ab
+No match
+
+/a(?!)b/B
+------------------------------------------------------------------
+ Bra
+ a
+ *FAIL
+ b
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?!)?a/B
+------------------------------------------------------------------
+ Bra
+ Brazero
+ Assert not
+ Ket
+ a
+ Ket
+ End
+------------------------------------------------------------------
+ ab
+ 0: a
+
+/a(*FAIL)+b/
+Failed: error 109 at offset 8: quantifier does not follow a repeatable item
+
+/(abc|pqr|123){0}[xyz]/I
+Capturing subpattern count = 1
+Starting code units: x y z
+Subject length lower bound = 1
+
+/(?(?=.*b)b|^)/I,auto_callout
+Capturing subpattern count = 0
+May match empty string
+Options: auto_callout
+Subject length lower bound = 0
+ adc
+--->adc
+ +0 ^ (?
+ +2 ^ (?=
+ +5 ^ .*
+ +7 ^ ^ b
+ +7 ^ ^ b
+ +7 ^^ b
+ +7 ^ b
++11 ^ ^
++12 ^ )
++13 ^ End of pattern
+ 0:
+ abc
+--->abc
+ +0 ^ (?
+ +2 ^ (?=
+ +5 ^ .*
+ +7 ^ ^ b
+ +7 ^ ^ b
+ +7 ^^ b
+ +8 ^ ^ )
+ +9 ^ b
+ +0 ^ (?
+ +2 ^ (?=
+ +5 ^ .*
+ +7 ^ ^ b
+ +7 ^^ b
+ +7 ^ b
+ +8 ^^ )
+ +9 ^ b
++10 ^^ |
++13 ^^ End of pattern
+ 0: b
+
+/(?(?=b).*b|^d)/I
+Capturing subpattern count = 0
+Subject length lower bound = 1
+
+/(?(?=.*b).*b|^d)/I
+Capturing subpattern count = 0
+Subject length lower bound = 1
+
+/xyz/auto_callout
+ xyz
+--->xyz
+ +0 ^ x
+ +1 ^^ y
+ +2 ^ ^ z
+ +3 ^ ^ End of pattern
+ 0: xyz
+ abcxyz
+--->abcxyz
+ +0 ^ x
+ +1 ^^ y
+ +2 ^ ^ z
+ +3 ^ ^ End of pattern
+ 0: xyz
+\= Expect no match
+ abc
+No match
+ abcxypqr
+No match
+
+/xyz/auto_callout,no_start_optimize
+ abcxyz
+--->abcxyz
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +1 ^^ y
+ +2 ^ ^ z
+ +3 ^ ^ End of pattern
+ 0: xyz
+\= Expect no match
+ abc
+--->abc
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+No match
+ abcxypqr
+--->abcxypqr
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +1 ^^ y
+ +2 ^ ^ z
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+No match
+
+/(*NO_START_OPT)xyz/auto_callout
+ abcxyz
+--->abcxyz
++15 ^ x
++15 ^ x
++15 ^ x
++15 ^ x
++16 ^^ y
++17 ^ ^ z
++18 ^ ^ End of pattern
+ 0: xyz
+
+/(*NO_AUTO_POSSESS)a+b/B
+------------------------------------------------------------------
+ Bra
+ a+
+ b
+ Ket
+ End
+------------------------------------------------------------------
+
+/xyz/auto_callout,no_start_optimize
+ abcxyz
+--->abcxyz
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +0 ^ x
+ +1 ^^ y
+ +2 ^ ^ z
+ +3 ^ ^ End of pattern
+ 0: xyz
+
+/^"((?(?=[a])[^"])|b)*"$/auto_callout
+ "ab"
+--->"ab"
+ +0 ^ ^
+ +1 ^ "
+ +2 ^^ (
+ +3 ^^ (?
+ +5 ^^ (?=
+ +8 ^^ [a]
++11 ^ ^ )
++12 ^^ [^"]
++16 ^ ^ )
++17 ^ ^ |
+ +3 ^ ^ (?
+ +5 ^ ^ (?=
+ +8 ^ ^ [a]
++17 ^ ^ |
++21 ^ ^ "
++18 ^ ^ b
++19 ^ ^ )*
+ +3 ^ ^ (?
+ +5 ^ ^ (?=
+ +8 ^ ^ [a]
++17 ^ ^ |
++21 ^ ^ "
++22 ^ ^ $
++23 ^ ^ End of pattern
+ 0: "ab"
+ 1:
+
+/^"((?(?=[a])[^"])|b)*"$/
+ "ab"
+ 0: "ab"
+ 1:
+
+/^X(?5)(a)(?|(b)|(q))(c)(d)Y/
+Failed: error 115 at offset 5: reference to non-existent subpattern
+ XYabcdY
+
+/^X(?&N)(a)(?|(b)|(q))(c)(d)(?<N>Y)/
+ XYabcdY
+ 0: XYabcdY
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: Y
+
+/Xa{2,4}b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/Xa{2,4}?b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/Xa{2,4}+b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/X\d{2,4}b/
+ X\=ps
+Partial match: X
+ X3\=ps
+Partial match: X3
+ X33\=ps
+Partial match: X33
+ X333\=ps
+Partial match: X333
+ X3333\=ps
+Partial match: X3333
+
+/X\d{2,4}?b/
+ X\=ps
+Partial match: X
+ X3\=ps
+Partial match: X3
+ X33\=ps
+Partial match: X33
+ X333\=ps
+Partial match: X333
+ X3333\=ps
+Partial match: X3333
+
+/X\d{2,4}+b/
+ X\=ps
+Partial match: X
+ X3\=ps
+Partial match: X3
+ X33\=ps
+Partial match: X33
+ X333\=ps
+Partial match: X333
+ X3333\=ps
+Partial match: X3333
+
+/X\D{2,4}b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/X\D{2,4}?b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/X\D{2,4}+b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/X[abc]{2,4}b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/X[abc]{2,4}?b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/X[abc]{2,4}+b/
+ X\=ps
+Partial match: X
+ Xa\=ps
+Partial match: Xa
+ Xaa\=ps
+Partial match: Xaa
+ Xaaa\=ps
+Partial match: Xaaa
+ Xaaaa\=ps
+Partial match: Xaaaa
+
+/X[^a]{2,4}b/
+ X\=ps
+Partial match: X
+ Xz\=ps
+Partial match: Xz
+ Xzz\=ps
+Partial match: Xzz
+ Xzzz\=ps
+Partial match: Xzzz
+ Xzzzz\=ps
+Partial match: Xzzzz
+
+/X[^a]{2,4}?b/
+ X\=ps
+Partial match: X
+ Xz\=ps
+Partial match: Xz
+ Xzz\=ps
+Partial match: Xzz
+ Xzzz\=ps
+Partial match: Xzzz
+ Xzzzz\=ps
+Partial match: Xzzzz
+
+/X[^a]{2,4}+b/
+ X\=ps
+Partial match: X
+ Xz\=ps
+Partial match: Xz
+ Xzz\=ps
+Partial match: Xzz
+ Xzzz\=ps
+Partial match: Xzzz
+ Xzzzz\=ps
+Partial match: Xzzzz
+
+/(Y)X\1{2,4}b/
+ YX\=ps
+Partial match: YX
+ YXY\=ps
+Partial match: YXY
+ YXYY\=ps
+Partial match: YXYY
+ YXYYY\=ps
+Partial match: YXYYY
+ YXYYYY\=ps
+Partial match: YXYYYY
+
+/(Y)X\1{2,4}?b/
+ YX\=ps
+Partial match: YX
+ YXY\=ps
+Partial match: YXY
+ YXYY\=ps
+Partial match: YXYY
+ YXYYY\=ps
+Partial match: YXYYY
+ YXYYYY\=ps
+Partial match: YXYYYY
+
+/(Y)X\1{2,4}+b/
+ YX\=ps
+Partial match: YX
+ YXY\=ps
+Partial match: YXY
+ YXYY\=ps
+Partial match: YXYY
+ YXYYY\=ps
+Partial match: YXYYY
+ YXYYYY\=ps
+Partial match: YXYYYY
+
+/\++\KZ|\d+X|9+Y/startchar
+ ++++123999\=ps
+Partial match: 123999
+ ++++123999Y\=ps
+ 0: 999Y
+ ++++Z1234\=ps
+ 0: ++++Z
+ ^^^^
+
+/Z(*F)/
+\= Expect no match
+ Z\=ps
+No match
+ ZA\=ps
+No match
+
+/Z(?!)/
+\= Expect no match
+ Z\=ps
+No match
+ ZA\=ps
+No match
+
+/dog(sbody)?/
+ dogs\=ps
+ 0: dog
+ dogs\=ph
+Partial match: dogs
+
+/dog(sbody)??/
+ dogs\=ps
+ 0: dog
+ dogs\=ph
+ 0: dog
+
+/dog|dogsbody/
+ dogs\=ps
+ 0: dog
+ dogs\=ph
+ 0: dog
+
+/dogsbody|dog/
+ dogs\=ps
+ 0: dog
+ dogs\=ph
+Partial match: dogs
+
+/\bthe cat\b/
+ the cat\=ps
+ 0: the cat
+ the cat\=ph
+Partial match: the cat
+
+/abc/
+ abc\=ps
+ 0: abc
+ abc\=ph
+ 0: abc
+
+/abc\K123/startchar
+ xyzabc123pqr
+ 0: abc123
+ ^^^
+ xyzabc12\=ps
+Partial match: abc12
+ xyzabc12\=ph
+Partial match: abc12
+
+/(?<=abc)123/
+ xyzabc123pqr
+ 0: 123
+ xyzabc12\=ps
+Partial match: abc12
+ <<<
+ xyzabc12\=ph
+Partial match: abc12
+ <<<
+
+/\babc\b/
+ +++abc+++
+ 0: abc
+ +++ab\=ps
+Partial match: +ab
+ <
+ +++ab\=ph
+Partial match: +ab
+ <
+
+/(?&word)(?&element)(?(DEFINE)(?<element><[^m][^>]>[^<])(?<word>\w*+))/B
+------------------------------------------------------------------
+ Bra
+ Recurse
+ Recurse
+ Cond
+ Cond false
+ CBra 1
+ <
+ [^m]
+ [^>]
+ >
+ [^<]
+ Ket
+ CBra 2
+ \w*+
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?&word)(?&element)(?(DEFINE)(?<element><[^\d][^>]>[^<])(?<word>\w*+))/B
+------------------------------------------------------------------
+ Bra
+ Recurse
+ Recurse
+ Cond
+ Cond false
+ CBra 1
+ <
+ [\x00-/:-\xff] (neg)
+ [^>]
+ >
+ [^<]
+ Ket
+ CBra 2
+ \w*+
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(ab)(x(y)z(cd(*ACCEPT)))pq/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ ab
+ Ket
+ CBra 2
+ x
+ CBra 3
+ y
+ Ket
+ z
+ CBra 4
+ cd
+ Close 4
+ Close 2
+ *ACCEPT
+ Ket
+ Ket
+ pq
+ Ket
+ End
+------------------------------------------------------------------
+
+/abc\K/aftertext,startchar
+ abcdef
+ 0: abc
+ ^^^
+ 0+ def
+ abcdef\=notempty_atstart
+ 0: abc
+ ^^^
+ 0+ def
+ xyzabcdef\=notempty_atstart
+ 0: abc
+ ^^^
+ 0+ def
+\= Expect no match
+ abcdef\=notempty
+No match
+ xyzabcdef\=notempty
+No match
+
+/^(?:(?=abc)|abc\K)/aftertext,startchar
+ abcdef
+ 0:
+ 0+ abcdef
+ abcdef\=notempty_atstart
+ 0: abc
+ ^^^
+ 0+ def
+\= Expect no match
+ abcdef\=notempty
+No match
+
+/a?b?/aftertext
+ xyz
+ 0:
+ 0+ xyz
+ xyzabc
+ 0:
+ 0+ xyzabc
+ xyzabc\=notempty
+ 0: ab
+ 0+ c
+ xyzabc\=notempty_atstart
+ 0:
+ 0+ yzabc
+ xyz\=notempty_atstart
+ 0:
+ 0+ yz
+\= Expect no match
+ xyz\=notempty
+No match
+
+/^a?b?/aftertext
+ xyz
+ 0:
+ 0+ xyz
+ xyzabc
+ 0:
+ 0+ xyzabc
+\= Expect no match
+ xyzabc\=notempty
+No match
+ xyzabc\=notempty_atstart
+No match
+ xyz\=notempty_atstart
+No match
+ xyz\=notempty
+No match
+
+/^(?<name>a|b\g<name>c)/
+ aaaa
+ 0: a
+ 1: a
+ bacxxx
+ 0: bac
+ 1: bac
+ bbaccxxx
+ 0: bbacc
+ 1: bbacc
+ bbbacccxx
+ 0: bbbaccc
+ 1: bbbaccc
+
+/^(?<name>a|b\g'name'c)/
+ aaaa
+ 0: a
+ 1: a
+ bacxxx
+ 0: bac
+ 1: bac
+ bbaccxxx
+ 0: bbacc
+ 1: bbacc
+ bbbacccxx
+ 0: bbbaccc
+ 1: bbbaccc
+
+/^(a|b\g<1>c)/
+ aaaa
+ 0: a
+ 1: a
+ bacxxx
+ 0: bac
+ 1: bac
+ bbaccxxx
+ 0: bbacc
+ 1: bbacc
+ bbbacccxx
+ 0: bbbaccc
+ 1: bbbaccc
+
+/^(a|b\g'1'c)/
+ aaaa
+ 0: a
+ 1: a
+ bacxxx
+ 0: bac
+ 1: bac
+ bbaccxxx
+ 0: bbacc
+ 1: bbacc
+ bbbacccxx
+ 0: bbbaccc
+ 1: bbbaccc
+
+/^(a|b\g'-1'c)/
+ aaaa
+ 0: a
+ 1: a
+ bacxxx
+ 0: bac
+ 1: bac
+ bbaccxxx
+ 0: bbacc
+ 1: bbacc
+ bbbacccxx
+ 0: bbbaccc
+ 1: bbbaccc
+
+/(^(a|b\g<-1>c))/
+ aaaa
+ 0: a
+ 1: a
+ 2: a
+ bacxxx
+ 0: bac
+ 1: bac
+ 2: bac
+ bbaccxxx
+ 0: bbacc
+ 1: bbacc
+ 2: bbacc
+ bbbacccxx
+ 0: bbbaccc
+ 1: bbbaccc
+ 2: bbbaccc
+
+/(?-i:\g<name>)(?i:(?<name>a))/
+ XaaX
+ 0: aa
+ 1: a
+ XAAX
+ 0: AA
+ 1: A
+
+/(?i:\g<name>)(?-i:(?<name>a))/
+ XaaX
+ 0: aa
+ 1: a
+\= Expect no match
+ XAAX
+No match
+
+/(?-i:\g<+1>)(?i:(a))/
+ XaaX
+ 0: aa
+ 1: a
+ XAAX
+ 0: AA
+ 1: A
+
+/(?=(?<regex>(?#simplesyntax)\$(?<name>[a-zA-Z_\x{7f}-\x{ff}][a-zA-Z0-9_\x{7f}-\x{ff}]*)(?:\[(?<index>[a-zA-Z0-9_\x{7f}-\x{ff}]+|\$\g<name>)\]|->\g<name>(\(.*?\))?)?|(?#simple syntax withbraces)\$\{(?:\g<name>(?<indices>\[(?:\g<index>|'(?:\\.|[^'\\])*'|"(?:\g<regex>|\\.|[^"\\])*")\])?|\g<complex>|\$\{\g<complex>\})\}|(?#complexsyntax)\{(?<complex>\$(?<segment>\g<name>(\g<indices>*|\(.*?\))?)(?:->\g<segment>)*|\$\g<complex>|\$\{\g<complex>\})\}))\{/
+
+/(?<n>a|b|c)\g<n>*/
+ abc
+ 0: abc
+ 1: a
+ accccbbb
+ 0: accccbbb
+ 1: a
+
+/^X(?7)(a)(?|(b)|(q)(r)(s))(c)(d)(Y)/
+ XYabcdY
+ 0: XYabcdY
+ 1: a
+ 2: b
+ 3: <unset>
+ 4: <unset>
+ 5: c
+ 6: d
+ 7: Y
+
+/(?<=b(?1)|zzz)(a)/
+ xbaax
+ 0: a
+ 1: a
+ xzzzax
+ 0: a
+ 1: a
+
+/(a)(?<=b\1)/
+
+/(a)(?<=b+(?1))/
+Failed: error 125 at offset 3: lookbehind assertion is not fixed length
+
+/(a+)(?<=b(?1))/
+Failed: error 125 at offset 4: lookbehind assertion is not fixed length
+
+/(a(?<=b(?1)))/
+Failed: error 125 at offset 2: lookbehind assertion is not fixed length
+
+/(?<=b(?1))xyz/
+Failed: error 115 at offset 8: reference to non-existent subpattern
+
+/(?<=b(?1))xyz(b+)pqrstuvew/
+Failed: error 125 at offset 0: lookbehind assertion is not fixed length
+
+/(a|bc)\1/I
+Capturing subpattern count = 1
+Max back reference = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/(a|bc)\1{2,3}/I
+Capturing subpattern count = 1
+Max back reference = 1
+Starting code units: a b
+Subject length lower bound = 3
+
+/(a|bc)(?1)/I
+Capturing subpattern count = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/(a|b\1)(a|b\1)/I
+Capturing subpattern count = 2
+Max back reference = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/(a|b\1){2}/I
+Capturing subpattern count = 1
+Max back reference = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/(a|bbbb\1)(a|bbbb\1)/I
+Capturing subpattern count = 2
+Max back reference = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/(a|bbbb\1){2}/I
+Capturing subpattern count = 1
+Max back reference = 1
+Starting code units: a b
+Subject length lower bound = 2
+
+/^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'F'
+Last code unit = ':'
+Subject length lower bound = 22
+
+/<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/Iis
+Capturing subpattern count = 11
+Options: caseless dotall
+First code unit = '<'
+Last code unit = '>'
+Subject length lower bound = 47
+
+"(?>.*/)foo"I
+Capturing subpattern count = 0
+Last code unit = 'o'
+Subject length lower bound = 4
+
+/(?(?=[^a-z]+[a-z]) \d{2}-[a-z]{3}-\d{2} | \d{2}-\d{2}-\d{2} ) /Ix
+Capturing subpattern count = 0
+Options: extended
+Last code unit = '-'
+Subject length lower bound = 8
+
+/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/Ii
+Capturing subpattern count = 1
+Options: caseless
+Starting code units: A B C a b c
+Subject length lower bound = 1
+
+/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/I
+Capturing subpattern count = 0
+Starting code units: c d
+Last code unit = 'b'
+Subject length lower bound = 41
+
+/<a[\s]+href[\s]*=[\s]* # find <a href=
+ ([\"\'])? # find single or double quote
+ (?(1) (.*?)\1 | ([^\s]+)) # if quote found, match up to next matching
+ # quote, otherwise match up to next space
+/Iisx
+Capturing subpattern count = 3
+Max back reference = 1
+Options: caseless dotall extended
+First code unit = '<'
+Last code unit = '='
+Subject length lower bound = 9
+
+/^(?!:) # colon disallowed at start
+ (?: # start of item
+ (?: [0-9a-f]{1,4} | # 1-4 hex digits or
+ (?(1)0 | () ) ) # if null previously matched, fail; else null
+ : # followed by colon
+ ){1,7} # end item; 1-7 of them required
+ [0-9a-f]{1,4} $ # final hex number at end of string
+ (?(1)|.) # check that there was an empty component
+ /Iix
+Capturing subpattern count = 1
+Max back reference = 1
+Compile options: caseless extended
+Overall options: anchored caseless extended
+Last code unit = ':'
+Subject length lower bound = 2
+
+/(?|(?<a>A)|(?<a>B))/I
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ a 1
+Starting code units: A B
+Subject length lower bound = 1
+ AB\=copy=a
+ 0: A
+ 1: A
+ C A (1) a (group 1)
+ BA\=copy=a
+ 0: B
+ 1: B
+ C B (1) a (group 1)
+
+/(?|(?<a>A)|(?<b>B))/
+Failed: error 165 at offset 16: different names for subpatterns of the same number are not allowed
+
+/(?:a(?<quote> (?<apostrophe>')|(?<realquote>")) |
+ b(?<quote> (?<apostrophe>')|(?<realquote>")) )
+ (?('quote')[a-z]+|[0-9]+)/Ix,dupnames
+Capturing subpattern count = 6
+Max back reference = 4
+Named capturing subpatterns:
+ apostrophe 2
+ apostrophe 5
+ quote 1
+ quote 4
+ realquote 3
+ realquote 6
+Options: dupnames extended
+Starting code units: a b
+Subject length lower bound = 3
+ a"aaaaa
+ 0: a"aaaaa
+ 1: "
+ 2: <unset>
+ 3: "
+ b"aaaaa
+ 0: b"aaaaa
+ 1: <unset>
+ 2: <unset>
+ 3: <unset>
+ 4: "
+ 5: <unset>
+ 6: "
+\= Expect no match
+ b"11111
+No match
+ a"11111
+No match
+
+/^(?|(a)(b)(c)(?<D>d)|(?<D>e)) (?('D')X|Y)/IBx,dupnames
+------------------------------------------------------------------
+ Bra
+ ^
+ Bra
+ CBra 1
+ a
+ Ket
+ CBra 2
+ b
+ Ket
+ CBra 3
+ c
+ Ket
+ CBra 4
+ d
+ Ket
+ Alt
+ CBra 1
+ e
+ Ket
+ Ket
+ Cond
+ Cond ref <D>2
+ X
+ Alt
+ Y
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 4
+Max back reference = 4
+Named capturing subpatterns:
+ D 4
+ D 1
+Compile options: dupnames extended
+Overall options: anchored dupnames extended
+Starting code units: a e
+Subject length lower bound = 2
+ abcdX
+ 0: abcdX
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ eX
+ 0: eX
+ 1: e
+\= Expect no match
+ abcdY
+No match
+ ey
+No match
+
+/(?<A>a) (b)(c) (?<A>d (?(R&A)$ | (?4)) )/IBx,dupnames
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ a
+ Ket
+ CBra 2
+ b
+ Ket
+ CBra 3
+ c
+ Ket
+ CBra 4
+ d
+ Cond
+ Cond recurse <A>2
+ $
+ Alt
+ Recurse
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 4
+Max back reference = 4
+Named capturing subpatterns:
+ A 1
+ A 4
+Options: dupnames extended
+First code unit = 'a'
+Last code unit = 'd'
+Subject length lower bound = 4
+ abcdd
+ 0: abcdd
+ 1: a
+ 2: b
+ 3: c
+ 4: dd
+\= Expect no match
+ abcdde
+No match
+
+/abcd*/
+ xxxxabcd\=ps
+ 0: abcd
+ xxxxabcd\=ph
+Partial match: abcd
+
+/abcd*/i
+ xxxxabcd\=ps
+ 0: abcd
+ xxxxabcd\=ph
+Partial match: abcd
+ XXXXABCD\=ps
+ 0: ABCD
+ XXXXABCD\=ph
+Partial match: ABCD
+
+/abc\d*/
+ xxxxabc1\=ps
+ 0: abc1
+ xxxxabc1\=ph
+Partial match: abc1
+
+/(a)bc\1*/
+ xxxxabca\=ps
+ 0: abca
+ 1: a
+ xxxxabca\=ph
+Partial match: abca
+
+/abc[de]*/
+ xxxxabcde\=ps
+ 0: abcde
+ xxxxabcde\=ph
+Partial match: abcde
+
+/(\3)(\1)(a)/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ cat
+ 0: a
+ 1:
+ 2:
+ 3: a
+
+/(\3)(\1)(a)/I,alt_bsux,allow_empty_class,match_unset_backref,dupnames
+Capturing subpattern count = 3
+Max back reference = 3
+Options: alt_bsux allow_empty_class dupnames match_unset_backref
+Last code unit = 'a'
+Subject length lower bound = 1
+ cat
+ 0: a
+ 1:
+ 2:
+ 3: a
+
+/(\3)(\1)(a)/I
+Capturing subpattern count = 3
+Max back reference = 3
+Last code unit = 'a'
+Subject length lower bound = 3
+\= Expect no match
+ cat
+No match
+
+/i(?(DEFINE)(?<s>a))/I
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ s 1
+First code unit = 'i'
+Subject length lower bound = 1
+ i
+ 0: i
+
+/()i(?(1)a)/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'i'
+Subject length lower bound = 1
+ ia
+ 0: ia
+ 1:
+
+/(?i)a(?-i)b|c/B
+------------------------------------------------------------------
+ Bra
+ /i a
+ b
+ Alt
+ c
+ Ket
+ End
+------------------------------------------------------------------
+ XabX
+ 0: ab
+ XAbX
+ 0: Ab
+ CcC
+ 0: c
+\= Expect no match
+ XABX
+No match
+
+/(?i)a(?s)b|c/B
+------------------------------------------------------------------
+ Bra
+ /i ab
+ Alt
+ /i c
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?i)a(?s-i)b|c/B
+------------------------------------------------------------------
+ Bra
+ /i a
+ b
+ Alt
+ c
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(ab(c\1)d|x){2}$/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Once
+ CBra 1
+ ab
+ CBra 2
+ c
+ \1
+ Ket
+ d
+ Alt
+ x
+ Ket
+ Ket
+ Once
+ CBra 1
+ ab
+ CBra 2
+ c
+ \1
+ Ket
+ d
+ Alt
+ x
+ Ket
+ Ket
+ $
+ Ket
+ End
+------------------------------------------------------------------
+ xabcxd
+ 0: xabcxd
+ 1: abcxd
+ 2: cx
+
+/^(?&t)*+(?(DEFINE)(?<t>.))$/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Braposzero
+ SBraPos
+ Recurse
+ KetRpos
+ Cond
+ Cond false
+ CBra 1
+ Any
+ Ket
+ Ket
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?&t)*(?(DEFINE)(?<t>.))$/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Brazero
+ SBra
+ Recurse
+ KetRmax
+ Cond
+ Cond false
+ CBra 1
+ Any
+ Ket
+ Ket
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+# This one is here because Perl gives the match as "b" rather than "ab". I
+# believe this to be a Perl bug.
+
+/(?>a\Kb)z|(ab)/
+ ab\=startchar
+ 0: ab
+ 1: ab
+
+/(?P<L1>(?P<L2>0|)|(?P>L2)(?P>L1))/
+ abcd
+ 0:
+ 1:
+ 2:
+ 0abc
+ 0: 0
+ 1: 0
+ 2: 0
+
+/abc(*MARK:)pqr/
+Failed: error 166 at offset 10: (*MARK) must have an argument
+
+/abc(*:)pqr/
+Failed: error 166 at offset 6: (*MARK) must have an argument
+
+/(*COMMIT:X)/B
+------------------------------------------------------------------
+ Bra
+ *COMMIT X
+ Ket
+ End
+------------------------------------------------------------------
+
+# This should, and does, fail. In Perl, it does not, which I think is a
+# bug because replacing the B in the pattern by (B|D) does make it fail.
+# Turning off Perl's optimization by inserting (??{""}) also makes it fail.
+
+/A(*COMMIT)B/aftertext,mark
+\= Expect no match
+ ACABX
+No match
+
+# These should be different, but in Perl they are not, which I think
+# is a bug in Perl.
+
+/A(*THEN)B|A(*THEN)C/mark
+ AC
+ 0: AC
+
+/A(*PRUNE)B|A(*PRUNE)C/mark
+\= Expect no match
+ AC
+No match
+
+# Mark names can be duplicated. Perl doesn't give a mark for this one,
+# though PCRE2 does.
+
+/^A(*:A)B|^X(*:A)Y/mark
+\= Expect no match
+ XAQQ
+No match, mark = A
+
+# COMMIT at the start of a pattern should be the same as an anchor. Perl
+# optimizations defeat this. So does the PCRE2 optimization unless we disable
+# it.
+
+/(*COMMIT)ABC/
+ ABCDEFG
+ 0: ABC
+
+/(*COMMIT)ABC/no_start_optimize
+\= Expect no match
+ DEFGABC
+No match
+
+/^(ab (c+(*THEN)cd) | xyz)/x
+\= Expect no match
+ abcccd
+No match
+
+/^(ab (c+(*PRUNE)cd) | xyz)/x
+\= Expect no match
+ abcccd
+No match
+
+/^(ab (c+(*FAIL)cd) | xyz)/x
+\= Expect no match
+ abcccd
+No match
+
+# Perl gets some of these wrong
+
+/(?>.(*ACCEPT))*?5/
+ abcde
+ 0: a
+
+/(.(*ACCEPT))*?5/
+ abcde
+ 0: a
+ 1: a
+
+/(.(*ACCEPT))5/
+ abcde
+ 0: a
+ 1: a
+
+/(.(*ACCEPT))*5/
+ abcde
+ 0: a
+ 1: a
+
+/A\NB./B
+------------------------------------------------------------------
+ Bra
+ A
+ Any
+ B
+ Any
+ Ket
+ End
+------------------------------------------------------------------
+ ACBD
+ 0: ACBD
+\= Expect no match
+ A\nB
+No match
+ ACB\n
+No match
+
+/A\NB./Bs
+------------------------------------------------------------------
+ Bra
+ A
+ Any
+ B
+ AllAny
+ Ket
+ End
+------------------------------------------------------------------
+ ACBD
+ 0: ACBD
+ ACB\n
+ 0: ACB\x0a
+\= Expect no match
+ A\nB
+No match
+
+/A\NB/newline=crlf
+ A\nB
+ 0: A\x0aB
+ A\rB
+ 0: A\x0dB
+\= Expect no match
+ A\r\nB
+No match
+
+/\R+b/B
+------------------------------------------------------------------
+ Bra
+ \R++
+ b
+ Ket
+ End
+------------------------------------------------------------------
+
+/\R+\n/B
+------------------------------------------------------------------
+ Bra
+ \R+
+ \x0a
+ Ket
+ End
+------------------------------------------------------------------
+
+/\R+\d/B
+------------------------------------------------------------------
+ Bra
+ \R++
+ \d
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d*\R/B
+------------------------------------------------------------------
+ Bra
+ \d*+
+ \R
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s*\R/B
+------------------------------------------------------------------
+ Bra
+ \s*
+ \R
+ Ket
+ End
+------------------------------------------------------------------
+ \x20\x0a
+ 0: \x0a
+ \x20\x0d
+ 0: \x0d
+ \x20\x0d\x0a
+ 0: \x0d\x0a
+
+/\S*\R/B
+------------------------------------------------------------------
+ Bra
+ \S*+
+ \R
+ Ket
+ End
+------------------------------------------------------------------
+ a\x0a
+ 0: a\x0a
+
+/X\h*\R/B
+------------------------------------------------------------------
+ Bra
+ X
+ \h*+
+ \R
+ Ket
+ End
+------------------------------------------------------------------
+ X\x20\x0a
+ 0: X \x0a
+
+/X\H*\R/B
+------------------------------------------------------------------
+ Bra
+ X
+ \H*
+ \R
+ Ket
+ End
+------------------------------------------------------------------
+ X\x0d\x0a
+ 0: X\x0d\x0a
+
+/X\H+\R/B
+------------------------------------------------------------------
+ Bra
+ X
+ \H+
+ \R
+ Ket
+ End
+------------------------------------------------------------------
+ X\x0d\x0a
+ 0: X\x0d\x0a
+
+/X\H++\R/B
+------------------------------------------------------------------
+ Bra
+ X
+ \H++
+ \R
+ Ket
+ End
+------------------------------------------------------------------
+\= Expect no match
+ X\x0d\x0a
+No match
+
+/(?<=abc)def/
+ abc\=ph
+Partial match: abc
+ <<<
+
+/abc$/
+ abc
+ 0: abc
+ abc\=ps
+ 0: abc
+ abc\=ph
+Partial match: abc
+
+/abc$/m
+ abc
+ 0: abc
+ abc\n
+ 0: abc
+ abc\=ph
+Partial match: abc
+ abc\n\=ph
+ 0: abc
+ abc\=ps
+ 0: abc
+ abc\n\=ps
+ 0: abc
+
+/abc\z/
+ abc
+ 0: abc
+ abc\=ps
+ 0: abc
+ abc\=ph
+Partial match: abc
+
+/abc\Z/
+ abc
+ 0: abc
+ abc\=ps
+ 0: abc
+ abc\=ph
+Partial match: abc
+
+/abc\b/
+ abc
+ 0: abc
+ abc\=ps
+ 0: abc
+ abc\=ph
+Partial match: abc
+
+/abc\B/
+ abc\=ps
+Partial match: abc
+ abc\=ph
+Partial match: abc
+\= Expect no match
+ abc
+No match
+
+/.+/
+\= Bad offsets
+ abc\=offset=4
+Failed: error -33: bad offset value
+ abc\=offset=-4
+** Invalid value in 'offset=-4'
+\= Valid data
+ abc\=offset=0
+ 0: abc
+ abc\=offset=1
+ 0: bc
+ abc\=offset=2
+ 0: c
+\= Expect no match
+ abc\=offset=3
+No match
+
+/^\cģ/
+Failed: error 168 at offset 3: \c must be followed by a printable ASCII character
+
+/(?P<abn>(?P=abn)xxx)/B
+------------------------------------------------------------------
+ Bra
+ Once
+ CBra 1
+ \1
+ xxx
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(a\1z)/B
+------------------------------------------------------------------
+ Bra
+ Once
+ CBra 1
+ a
+ \1
+ z
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?P<abn>(?P=abn)(?<badstufxxx)/B
+Failed: error 142 at offset 29: syntax error in subpattern name (missing terminator)
+
+/(?P<abn>(?P=axn)xxx)/B
+Failed: error 115 at offset 12: reference to non-existent subpattern
+
+/(?P<abn>(?P=axn)xxx)(?<axn>yy)/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ \2
+ xxx
+ Ket
+ CBra 2
+ yy
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+# These tests are here because Perl gets the first one wrong.
+
+/(\R*)(.)/s
+ \r\n
+ 0: \x0d
+ 1:
+ 2: \x0d
+ \r\r\n\n\r
+ 0: \x0d\x0d\x0a\x0a\x0d
+ 1: \x0d\x0d\x0a\x0a
+ 2: \x0d
+ \r\r\n\n\r\n
+ 0: \x0d\x0d\x0a\x0a\x0d
+ 1: \x0d\x0d\x0a\x0a
+ 2: \x0d
+
+/(\R)*(.)/s
+ \r\n
+ 0: \x0d
+ 1: <unset>
+ 2: \x0d
+ \r\r\n\n\r
+ 0: \x0d\x0d\x0a\x0a\x0d
+ 1: \x0a
+ 2: \x0d
+ \r\r\n\n\r\n
+ 0: \x0d\x0d\x0a\x0a\x0d
+ 1: \x0a
+ 2: \x0d
+
+/((?>\r\n|\n|\x0b|\f|\r|\x85)*)(.)/s
+ \r\n
+ 0: \x0d
+ 1:
+ 2: \x0d
+ \r\r\n\n\r
+ 0: \x0d\x0d\x0a\x0a\x0d
+ 1: \x0d\x0d\x0a\x0a
+ 2: \x0d
+ \r\r\n\n\r\n
+ 0: \x0d\x0d\x0a\x0a\x0d
+ 1: \x0d\x0d\x0a\x0a
+ 2: \x0d
+
+# -------------
+
+/^abc$/B
+------------------------------------------------------------------
+ Bra
+ ^
+ abc
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/^abc$/Bm
+------------------------------------------------------------------
+ Bra
+ /m ^
+ abc
+ /m $
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(a)*+(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: a
+ 2: X
+\= Expect no match
+ aaaa
+No match
+
+/^(?:a)*+(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: X
+\= Expect no match
+ aaaa
+No match
+
+/(a)++1234/IB
+------------------------------------------------------------------
+ Bra
+ CBraPos 1
+ a
+ KetRpos
+ 1234
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = '4'
+Subject length lower bound = 5
+
+/([abc])++1234/I
+Capturing subpattern count = 1
+Starting code units: a b c
+Last code unit = '4'
+Subject length lower bound = 5
+
+/(?<=(abc)+)X/
+Failed: error 125 at offset 0: lookbehind assertion is not fixed length
+
+/(^ab)/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+
+/(^ab)++/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+
+/(^ab|^)+/I
+Capturing subpattern count = 1
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+
+/(^ab|^)++/I
+Capturing subpattern count = 1
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+
+/(?:^ab)/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+
+/(?:^ab)++/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 2
+
+/(?:^ab|^)+/I
+Capturing subpattern count = 0
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+
+/(?:^ab|^)++/I
+Capturing subpattern count = 0
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+
+/(.*ab)/I
+Capturing subpattern count = 1
+First code unit at start or follows newline
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(.*ab)++/I
+Capturing subpattern count = 1
+First code unit at start or follows newline
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(.*ab|.*)+/I
+Capturing subpattern count = 1
+May match empty string
+First code unit at start or follows newline
+Subject length lower bound = 0
+
+/(.*ab|.*)++/I
+Capturing subpattern count = 1
+May match empty string
+First code unit at start or follows newline
+Subject length lower bound = 0
+
+/(?:.*ab)/I
+Capturing subpattern count = 0
+First code unit at start or follows newline
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?:.*ab)++/I
+Capturing subpattern count = 0
+First code unit at start or follows newline
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?:.*ab|.*)+/I
+Capturing subpattern count = 0
+May match empty string
+First code unit at start or follows newline
+Subject length lower bound = 0
+
+/(?:.*ab|.*)++/I
+Capturing subpattern count = 0
+May match empty string
+First code unit at start or follows newline
+Subject length lower bound = 0
+
+/(?=a)[bcd]/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Subject length lower bound = 1
+
+/((?=a))[bcd]/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/((?=a))+[bcd]/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/((?=a))++[bcd]/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Subject length lower bound = 1
+
+/(?=a+)[bcd]/Ii
+Capturing subpattern count = 0
+Options: caseless
+First code unit = 'a' (caseless)
+Subject length lower bound = 1
+
+/(?=a+?)[bcd]/Ii
+Capturing subpattern count = 0
+Options: caseless
+First code unit = 'a' (caseless)
+Subject length lower bound = 1
+
+/(?=a++)[bcd]/Ii
+Capturing subpattern count = 0
+Options: caseless
+First code unit = 'a' (caseless)
+Subject length lower bound = 1
+
+/(?=a{3})[bcd]/Ii
+Capturing subpattern count = 0
+Options: caseless
+First code unit = 'a' (caseless)
+Last code unit = 'a' (caseless)
+Subject length lower bound = 1
+
+/(abc)\1+/
+
+# Perl doesn't get these right IMO (the 3rd is PCRE2-specific)
+
+/(?1)(?:(b(*ACCEPT))){0}/
+ b
+ 0: b
+
+/(?1)(?:(b(*ACCEPT))){0}c/
+ bc
+ 0: bc
+\= Expect no match
+ b
+No match
+
+/(?1)(?:((*ACCEPT))){0}c/
+ c
+ 0: c
+ c\=notempty
+ 0: c
+
+/^.*?(?(?=a)a|b(*THEN)c)/
+\= Expect no match
+ ba
+No match
+
+/^.*?(?(?=a)a|bc)/
+ ba
+ 0: ba
+
+/^.*?(?(?=a)a(*THEN)b|c)/
+\= Expect no match
+ ac
+No match
+
+/^.*?(?(?=a)a(*THEN)b)c/
+\= Expect no match
+ ac
+No match
+
+/^.*?(a(*THEN)b)c/
+\= Expect no match
+ aabc
+No match
+
+/^.*? (?1) c (?(DEFINE)(a(*THEN)b))/x
+ aabc
+ 0: aabc
+
+/^.*?(a(*THEN)b|z)c/
+ aabc
+ 0: aabc
+ 1: ab
+
+/^.*?(z|a(*THEN)b)c/
+ aabc
+ 0: aabc
+ 1: ab
+
+# These are here because they are not Perl-compatible; the studying means the
+# mark is not seen.
+
+/(*MARK:A)(*SKIP:B)(C|X)/mark
+ C
+ 0: C
+ 1: C
+MK: A
+\= Expect no match
+ D
+No match, mark = A
+
+/(*:A)A+(*SKIP:A)(B|Z)/mark
+\= Expect no match
+ AAAC
+No match, mark = A
+
+# ----------------------------
+
+"(?=a*(*ACCEPT)b)c"
+ c
+ 0: c
+ c\=notempty
+ 0: c
+
+/(?1)c(?(DEFINE)((*ACCEPT)b))/
+ c
+ 0: c
+ c\=notempty
+ 0: c
+
+/(?>(*ACCEPT)b)c/
+ c
+ 0:
+\= Expect no match
+ c\=notempty
+No match
+
+/(?:(?>(a)))+a%/allaftertext
+ %aa%
+ 0: aa%
+ 0+
+ 1: a
+ 1+ a%
+
+/(a)b|ac/allaftertext
+ ac\=ovector=1
+ 0: ac
+ 0+
+
+/(a)(b)x|abc/allaftertext
+ abc\=ovector=2
+ 0: abc
+ 0+
+
+/(a)bc|(a)(b)\2/
+ abc\=ovector=1
+Matched, but too many substrings
+ 0: abc
+ abc\=ovector=2
+ 0: abc
+ 1: a
+ aba\=ovector=1
+Matched, but too many substrings
+ 0: aba
+ aba\=ovector=2
+Matched, but too many substrings
+ 0: aba
+ 1: <unset>
+ aba\=ovector=3
+Matched, but too many substrings
+ 0: aba
+ 1: <unset>
+ 2: a
+ aba\=ovector=4
+ 0: aba
+ 1: <unset>
+ 2: a
+ 3: b
+
+/(?(DEFINE)(a(?2)|b)(b(?1)|a))(?:(?1)|(?2))/I
+Capturing subpattern count = 2
+May match empty string
+Subject length lower bound = 0
+
+/(a(?2)|b)(b(?1)|a)(?:(?1)|(?2))/I
+Capturing subpattern count = 2
+Starting code units: a b
+Subject length lower bound = 3
+
+/(a(?2)|b)(b(?1)|a)(?1)(?2)/I
+Capturing subpattern count = 2
+Starting code units: a b
+Subject length lower bound = 4
+
+/(abc)(?1)/I
+Capturing subpattern count = 1
+First code unit = 'a'
+Last code unit = 'c'
+Subject length lower bound = 6
+
+/(?:(foo)|(bar)|(baz))X/allcaptures
+ bazfooX
+ 0: fooX
+ 1: foo
+ 2: <unset>
+ 3: <unset>
+ foobazbarX
+ 0: barX
+ 1: <unset>
+ 2: bar
+ 3: <unset>
+ barfooX
+ 0: fooX
+ 1: foo
+ 2: <unset>
+ 3: <unset>
+ bazX
+ 0: bazX
+ 1: <unset>
+ 2: <unset>
+ 3: baz
+ foobarbazX
+ 0: bazX
+ 1: <unset>
+ 2: <unset>
+ 3: baz
+ bazfooX\=ovector=0
+ 0: fooX
+ 1: foo
+ 2: <unset>
+ 3: <unset>
+ bazfooX\=ovector=1
+Matched, but too many substrings
+ 0: fooX
+ bazfooX\=ovector=2
+ 0: fooX
+ 1: foo
+ bazfooX\=ovector=3
+ 0: fooX
+ 1: foo
+ 2: <unset>
+
+/(?=abc){3}abc/B
+------------------------------------------------------------------
+ Bra
+ Assert
+ abc
+ Ket
+ abc
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=abc)+abc/B
+------------------------------------------------------------------
+ Bra
+ Assert
+ abc
+ Ket
+ abc
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=abc)++abc/B
+------------------------------------------------------------------
+ Bra
+ Assert
+ abc
+ Ket
+ abc
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=abc){0}xyz/B
+------------------------------------------------------------------
+ Bra
+ Skip zero
+ Assert
+ abc
+ Ket
+ xyz
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=(a))?./B
+------------------------------------------------------------------
+ Bra
+ Brazero
+ Assert
+ CBra 1
+ a
+ Ket
+ Ket
+ Any
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=(a))??./B
+------------------------------------------------------------------
+ Bra
+ Braminzero
+ Assert
+ CBra 1
+ a
+ Ket
+ Ket
+ Any
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?=(a)){0}b(?1)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Skip zero
+ Assert
+ CBra 1
+ a
+ Ket
+ Ket
+ b
+ Recurse
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?(DEFINE)(a))?b(?1)/B
+------------------------------------------------------------------
+ Bra
+ Cond
+ Cond false
+ CBra 1
+ a
+ Ket
+ Ket
+ b
+ Recurse
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?=(?1))?[az]([abc])d/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Brazero
+ Assert
+ Recurse
+ Ket
+ [az]
+ CBra 1
+ [a-c]
+ Ket
+ d
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?!a){0}\w+/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Skip zero
+ Assert not
+ a
+ Ket
+ \w++
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?<=(abc))?xyz/B
+------------------------------------------------------------------
+ Bra
+ Brazero
+ AssertB
+ Reverse
+ CBra 1
+ abc
+ Ket
+ Ket
+ xyz
+ Ket
+ End
+------------------------------------------------------------------
+
+/[:a[:abc]b:]/B
+------------------------------------------------------------------
+ Bra
+ [:[a-c]
+ b:]
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(a(*:A)(d|e(*:B))z|aeq)/auto_callout
+ adz
+--->adz
+ +0 ^ ^
+ +1 ^ (
+ +2 ^ a
+ +3 ^^ (*:A)
+ +8 ^^ (
+Latest Mark: A
+ +9 ^^ d
++10 ^ ^ |
++18 ^ ^ z
++19 ^ ^ |
++24 ^ ^ End of pattern
+ 0: adz
+ 1: adz
+ 2: d
+ aez
+--->aez
+ +0 ^ ^
+ +1 ^ (
+ +2 ^ a
+ +3 ^^ (*:A)
+ +8 ^^ (
+Latest Mark: A
+ +9 ^^ d
++11 ^^ e
++12 ^ ^ (*:B)
++17 ^ ^ )
+Latest Mark: B
++18 ^ ^ z
++19 ^ ^ |
++24 ^ ^ End of pattern
+ 0: aez
+ 1: aez
+ 2: e
+ aeqwerty
+--->aeqwerty
+ +0 ^ ^
+ +1 ^ (
+ +2 ^ a
+ +3 ^^ (*:A)
+ +8 ^^ (
+Latest Mark: A
+ +9 ^^ d
++11 ^^ e
++12 ^ ^ (*:B)
++17 ^ ^ )
+Latest Mark: B
++18 ^ ^ z
++20 ^ a
++21 ^^ e
++22 ^ ^ q
++23 ^ ^ )
++24 ^ ^ End of pattern
+ 0: aeq
+ 1: aeq
+
+/.(*F)/
+\= Expect no match
+ abc\=ph
+No match
+
+/\btype\b\W*?\btext\b\W*?\bjavascript\b/I
+Capturing subpattern count = 0
+Max lookbehind = 1
+First code unit = 't'
+Last code unit = 't'
+Subject length lower bound = 18
+
+/\btype\b\W*?\btext\b\W*?\bjavascript\b|\burl\b\W*?\bshell:|<input\b.*?\btype\b\W*?\bimage\b|\bonkeyup\b\W*?\=/I
+Capturing subpattern count = 0
+Max lookbehind = 1
+Starting code units: < o t u
+Subject length lower bound = 8
+
+/a(*SKIP)c|b(*ACCEPT)|/I,aftertext
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ a
+ 0:
+ 0+
+
+/a(*SKIP)c|b(*ACCEPT)cd(*ACCEPT)|x/I
+Capturing subpattern count = 0
+Starting code units: a b x
+Subject length lower bound = 0
+ ax
+ 0: x
+
+'a*(*ACCEPT)b'aftertext
+ abc\=notempty_atstart
+ 0: a
+ 0+ bc
+ bbb\=notempty_atstart
+ 0:
+ 0+ bb
+\= Expect no match
+ \=notempty_atstart
+No match
+
+/(*ACCEPT)a/I,aftertext
+Capturing subpattern count = 0
+Subject length lower bound = 0
+ bax
+ 0:
+ 0+ bax
+
+/z(*ACCEPT)a/I,aftertext
+Capturing subpattern count = 0
+First code unit = 'z'
+Subject length lower bound = 0
+ baxzbx
+ 0: z
+ 0+ bx
+
+/^(?>a+)(?>(z+))\w/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Once
+ a++
+ Ket
+ Once
+ CBra 1
+ z++
+ Ket
+ Ket
+ \w
+ Ket
+ End
+------------------------------------------------------------------
+ aaaazzzzb
+ 0: aaaazzzzb
+ 1: zzzz
+\= Expect no match
+ aazz
+No match
+
+/(.)(\1|a(?2))/
+ bab
+ 0: bab
+ 1: b
+ 2: ab
+
+/\1|(.)(?R)\1/
+ cbbbc
+ 0: cbbbc
+ 1: c
+
+/(.)((?(1)c|a)|a(?2))/
+\= Expect no match
+ baa
+No match
+
+/(?P<abn>(?P=abn)xxx)/B
+------------------------------------------------------------------
+ Bra
+ Once
+ CBra 1
+ \1
+ xxx
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(a\1z)/B
+------------------------------------------------------------------
+ Bra
+ Once
+ CBra 1
+ a
+ \1
+ z
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/^a\x41z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ aAz
+ 0: aAz
+\= Expect no match
+ ax41z
+No match
+
+/^a[m\x41]z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ aAz
+ 0: aAz
+
+/^a\x1z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ ax1z
+ 0: ax1z
+
+/^a\u0041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ aAz
+ 0: aAz
+\= Expect no match
+ au0041z
+No match
+
+/^a[m\u0041]z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ aAz
+ 0: aAz
+
+/^a\u041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ au041z
+ 0: au041z
+\= Expect no match
+ aAz
+No match
+
+/^a\U0041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
+ aU0041z
+ 0: aU0041z
+\= Expect no match
+ aAz
+No match
+
+/(?(?=c)c|d)++Y/B
+------------------------------------------------------------------
+ Bra
+ BraPos
+ Cond
+ Assert
+ c
+ Ket
+ c
+ Alt
+ d
+ Ket
+ KetRpos
+ Y
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?(?=c)c|d)*+Y/B
+------------------------------------------------------------------
+ Bra
+ Braposzero
+ BraPos
+ Cond
+ Assert
+ c
+ Ket
+ c
+ Alt
+ d
+ Ket
+ KetRpos
+ Y
+ Ket
+ End
+------------------------------------------------------------------
+
+/a[\NB]c/
+Failed: error 171 at offset 4: \N is not supported in a class
+ aNc
+
+/a[B-\Nc]/
+Failed: error 150 at offset 6: invalid range in character class
+
+/a[B\Nc]/
+Failed: error 171 at offset 5: \N is not supported in a class
+
+/(a)(?2){0,1999}?(b)/
+
+/(a)(?(DEFINE)(b))(?2){0,1999}?(?2)/
+
+# This test, with something more complicated than individual letters, causes
+# different behaviour in Perl. Perhaps it disables some optimization; no tag is
+# passed back for the failures, whereas in PCRE2 there is a tag.
+
+/(A|P)(*:A)(B|P) | (X|P)(X|P)(*:B)(Y|P)/x,mark
+ AABC
+ 0: AB
+ 1: A
+ 2: B
+MK: A
+ XXYZ
+ 0: XXY
+ 1: <unset>
+ 2: <unset>
+ 3: X
+ 4: X
+ 5: Y
+MK: B
+\= Expect no match
+ XAQQ
+No match, mark = A
+ XAQQXZZ
+No match, mark = A
+ AXQQQ
+No match, mark = A
+ AXXQQQ
+No match, mark = B
+
+# Perl doesn't give marks for these, though it does if the alternatives are
+# replaced by single letters.
+
+/(b|q)(*:m)f|a(*:n)w/mark
+ aw
+ 0: aw
+MK: n
+\= Expect no match
+ abc
+No match, mark = m
+
+/(q|b)(*:m)f|a(*:n)w/mark
+ aw
+ 0: aw
+MK: n
+\= Expect no match
+ abc
+No match, mark = m
+
+# After a partial match, the behaviour is as for a failure.
+
+/^a(*:X)bcde/mark
+ abc\=ps
+Partial match, mark=X: abc
+
+# These are here because Perl doesn't return a mark, except for the first.
+
+/(?=(*:x))(q|)/aftertext,mark
+ abc
+ 0:
+ 0+ abc
+ 1:
+MK: x
+
+/(?=(*:x))((*:y)q|)/aftertext,mark
+ abc
+ 0:
+ 0+ abc
+ 1:
+MK: x
+
+/(?=(*:x))(?:(*:y)q|)/aftertext,mark
+ abc
+ 0:
+ 0+ abc
+MK: x
+
+/(?=(*:x))(?>(*:y)q|)/aftertext,mark
+ abc
+ 0:
+ 0+ abc
+MK: x
+
+/(?=a(*:x))(?!a(*:y)c)/aftertext,mark
+ ab
+ 0:
+ 0+ ab
+MK: x
+
+/(?=a(*:x))(?=a(*:y)c|)/aftertext,mark
+ ab
+ 0:
+ 0+ ab
+MK: x
+
+/(..)\1/
+ ab\=ps
+Partial match: ab
+ aba\=ps
+Partial match: aba
+ abab\=ps
+ 0: abab
+ 1: ab
+
+/(..)\1/i
+ ab\=ps
+Partial match: ab
+ abA\=ps
+Partial match: abA
+ aBAb\=ps
+ 0: aBAb
+ 1: aB
+
+/(..)\1{2,}/
+ ab\=ps
+Partial match: ab
+ aba\=ps
+Partial match: aba
+ abab\=ps
+Partial match: abab
+ ababa\=ps
+Partial match: ababa
+ ababab\=ps
+ 0: ababab
+ 1: ab
+ ababab\=ph
+Partial match: ababab
+ abababa\=ps
+ 0: ababab
+ 1: ab
+ abababa\=ph
+Partial match: abababa
+
+/(..)\1{2,}/i
+ ab\=ps
+Partial match: ab
+ aBa\=ps
+Partial match: aBa
+ aBAb\=ps
+Partial match: aBAb
+ AbaBA\=ps
+Partial match: AbaBA
+ abABAb\=ps
+ 0: abABAb
+ 1: ab
+ aBAbaB\=ph
+Partial match: aBAbaB
+ abABabA\=ps
+ 0: abABab
+ 1: ab
+ abaBABa\=ph
+Partial match: abaBABa
+
+/(..)\1{2,}?x/i
+ ab\=ps
+Partial match: ab
+ abA\=ps
+Partial match: abA
+ aBAb\=ps
+Partial match: aBAb
+ abaBA\=ps
+Partial match: abaBA
+ abAbaB\=ps
+Partial match: abAbaB
+ abaBabA\=ps
+Partial match: abaBabA
+ abAbABaBx\=ps
+ 0: abAbABaBx
+ 1: ab
+
+/^(..)\1/
+ aba\=ps
+Partial match: aba
+
+/^(..)\1{2,3}x/
+ aba\=ps
+Partial match: aba
+ ababa\=ps
+Partial match: ababa
+ ababa\=ph
+Partial match: ababa
+ abababx
+ 0: abababx
+ 1: ab
+ ababababx
+ 0: ababababx
+ 1: ab
+
+/^(..)\1{2,3}?x/
+ aba\=ps
+Partial match: aba
+ ababa\=ps
+Partial match: ababa
+ ababa\=ph
+Partial match: ababa
+ abababx
+ 0: abababx
+ 1: ab
+ ababababx
+ 0: ababababx
+ 1: ab
+
+/^(..)(\1{2,3})ab/
+ abababab
+ 0: abababab
+ 1: ab
+ 2: abab
+
+/^\R/
+ \r\=ps
+ 0: \x0d
+ \r\=ph
+Partial match: \x0d
+
+/^\R{2,3}x/
+ \r\=ps
+Partial match: \x0d
+ \r\=ph
+Partial match: \x0d
+ \r\r\=ps
+Partial match: \x0d\x0d
+ \r\r\=ph
+Partial match: \x0d\x0d
+ \r\r\r\=ps
+Partial match: \x0d\x0d\x0d
+ \r\r\r\=ph
+Partial match: \x0d\x0d\x0d
+ \r\rx
+ 0: \x0d\x0dx
+ \r\r\rx
+ 0: \x0d\x0d\x0dx
+
+/^\R{2,3}?x/
+ \r\=ps
+Partial match: \x0d
+ \r\=ph
+Partial match: \x0d
+ \r\r\=ps
+Partial match: \x0d\x0d
+ \r\r\=ph
+Partial match: \x0d\x0d
+ \r\r\r\=ps
+Partial match: \x0d\x0d\x0d
+ \r\r\r\=ph
+Partial match: \x0d\x0d\x0d
+ \r\rx
+ 0: \x0d\x0dx
+ \r\r\rx
+ 0: \x0d\x0d\x0dx
+
+/^\R?x/
+ \r\=ps
+Partial match: \x0d
+ \r\=ph
+Partial match: \x0d
+ x
+ 0: x
+ \rx
+ 0: \x0dx
+
+/^\R+x/
+ \r\=ps
+Partial match: \x0d
+ \r\=ph
+Partial match: \x0d
+ \r\n\=ps
+Partial match: \x0d\x0a
+ \r\n\=ph
+Partial match: \x0d\x0a
+ \rx
+ 0: \x0dx
+
+/^a$/newline=crlf
+ a\r\=ps
+Partial match: a\x0d
+ a\r\=ph
+Partial match: a\x0d
+
+/^a$/m,newline=crlf
+ a\r\=ps
+Partial match: a\x0d
+ a\r\=ph
+Partial match: a\x0d
+
+/^(a$|a\r)/newline=crlf
+ a\r\=ps
+ 0: a\x0d
+ 1: a\x0d
+ a\r\=ph
+Partial match: a\x0d
+
+/^(a$|a\r)/m,newline=crlf
+ a\r\=ps
+ 0: a\x0d
+ 1: a\x0d
+ a\r\=ph
+Partial match: a\x0d
+
+/./newline=crlf
+ \r\=ps
+ 0: \x0d
+ \r\=ph
+Partial match: \x0d
+
+/.{2,3}/newline=crlf
+ \r\=ps
+Partial match: \x0d
+ \r\=ph
+Partial match: \x0d
+ \r\r\=ps
+ 0: \x0d\x0d
+ \r\r\=ph
+Partial match: \x0d\x0d
+ \r\r\r\=ps
+ 0: \x0d\x0d\x0d
+ \r\r\r\=ph
+Partial match: \x0d\x0d\x0d
+
+/.{2,3}?/newline=crlf
+ \r\=ps
+Partial match: \x0d
+ \r\=ph
+Partial match: \x0d
+ \r\r\=ps
+ 0: \x0d\x0d
+ \r\r\=ph
+Partial match: \x0d\x0d
+ \r\r\r\=ps
+ 0: \x0d\x0d
+ \r\r\r\=ph
+ 0: \x0d\x0d
+
+"AB(C(D))(E(F))?(?(?=\2)(?=\4))"
+ ABCDGHI\=ovector=01
+Matched, but too many substrings
+ 0: ABCD
+
+# These are all run as real matches in test 1; here we are just checking the
+# settings of the anchored and startline bits.
+
+/(?>.*?a)(?<=ba)/I
+Capturing subpattern count = 0
+Max lookbehind = 2
+Last code unit = 'a'
+Subject length lower bound = 1
+
+/(?:.*?a)(?<=ba)/I
+Capturing subpattern count = 0
+Max lookbehind = 2
+First code unit at start or follows newline
+Last code unit = 'a'
+Subject length lower bound = 1
+
+/.*?a(*PRUNE)b/I
+Capturing subpattern count = 0
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/.*?a(*PRUNE)b/Is
+Capturing subpattern count = 0
+Options: dotall
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/^a(*PRUNE)b/Is
+Capturing subpattern count = 0
+Compile options: dotall
+Overall options: anchored dotall
+First code unit = 'a'
+Subject length lower bound = 2
+
+/.*?a(*SKIP)b/I
+Capturing subpattern count = 0
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?>.*?a)b/Is
+Capturing subpattern count = 0
+Options: dotall
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?>.*?a)b/I
+Capturing subpattern count = 0
+Last code unit = 'b'
+Subject length lower bound = 2
+
+/(?>^a)b/Is
+Capturing subpattern count = 0
+Compile options: dotall
+Overall options: anchored dotall
+First code unit = 'a'
+Subject length lower bound = 2
+
+/(?>.*?)(?<=(abcd)|(wxyz))/I
+Capturing subpattern count = 2
+Max lookbehind = 4
+May match empty string
+Subject length lower bound = 0
+
+/(?>.*)(?<=(abcd)|(wxyz))/I
+Capturing subpattern count = 2
+Max lookbehind = 4
+May match empty string
+Subject length lower bound = 0
+
+"(?>.*)foo"I
+Capturing subpattern count = 0
+Last code unit = 'o'
+Subject length lower bound = 3
+
+"(?>.*?)foo"I
+Capturing subpattern count = 0
+Last code unit = 'o'
+Subject length lower bound = 3
+
+/(?>^abc)/Im
+Capturing subpattern count = 0
+Options: multiline
+First code unit at start or follows newline
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/(?>.*abc)/Im
+Capturing subpattern count = 0
+Options: multiline
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/(?:.*abc)/Im
+Capturing subpattern count = 0
+Options: multiline
+First code unit at start or follows newline
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/(?:(a)+(?C1)bb|aa(?C2)b)/
+ aab\=callout_capture
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^ ^ b
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^^ b
+Callout 2: last capture = 0
+--->aab
+ ^ ^ b
+ 0: aab
+
+/(?:(a)++(?C1)bb|aa(?C2)b)/
+ aab\=callout_capture
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^ ^ b
+Callout 2: last capture = 0
+--->aab
+ ^ ^ b
+ 0: aab
+
+/(?:(?>(a))(?C1)bb|aa(?C2)b)/
+ aab\=callout_capture
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^^ b
+Callout 2: last capture = 0
+--->aab
+ ^ ^ b
+ 0: aab
+
+/(?:(?1)(?C1)x|ab(?C2))((a)){0}/
+ aab\=callout_capture
+Callout 1: last capture = 0
+--->aab
+ ^^ x
+Callout 1: last capture = 0
+--->aab
+ ^^ x
+Callout 2: last capture = 0
+--->aab
+ ^ ^ )
+ 0: ab
+
+/(?1)(?C1)((a)(?C2)){0}/
+ aab\=callout_capture
+Callout 2: last capture = 2
+ 1: <unset>
+ 2: a
+--->aab
+ ^^ ){0}
+Callout 1: last capture = 0
+--->aab
+ ^^ (
+ 0: a
+
+/(?:(a)+(?C1)bb|aa(?C2)b)++/
+ aab\=callout_capture
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^ ^ b
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^^ b
+Callout 2: last capture = 0
+--->aab
+ ^ ^ b
+ 0: aab
+ aab\=callout_capture,ovector=1
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^ ^ b
+Callout 1: last capture = 1
+ 1: a
+--->aab
+ ^^ b
+Callout 2: last capture = 0
+--->aab
+ ^ ^ b
+ 0: aab
+
+/(ab)x|ab/
+ ab\=ovector=0
+ 0: ab
+ ab\=ovector=1
+ 0: ab
+
+/(?<=123)(*MARK:xx)abc/mark
+ xxxx123a\=ph
+Partial match, mark=xx: 123a
+ <<<
+ xxxx123a\=ps
+Partial match, mark=xx: 123a
+ <<<
+
+/123\Kabc/startchar
+ xxxx123a\=ph
+Partial match: 123a
+ xxxx123a\=ps
+Partial match: 123a
+
+/^(?(?=a)aa|bb)/auto_callout
+ bb
+--->bb
+ +0 ^ ^
+ +1 ^ (?
+ +3 ^ (?=
+ +6 ^ a
++11 ^ b
++12 ^^ b
++13 ^ ^ )
++14 ^ ^ End of pattern
+ 0: bb
+
+/(?C1)^(?C2)(?(?C99)(?=(?C3)a(?C4))(?C5)a(?C6)a(?C7)|(?C8)b(?C9)b(?C10))(?C11)/
+ bb
+--->bb
+ 1 ^ ^
+ 2 ^ (?
+ 99 ^ (?=
+ 3 ^ a
+ 8 ^ b
+ 9 ^^ b
+ 10 ^ ^ )
+ 11 ^ ^ End of pattern
+ 0: bb
+
+# Perl seems to have a bug with this one.
+
+/aaaaa(*COMMIT)(*PRUNE)b|a+c/
+ aaaaaac
+ 0: aaaac
+
+# Here are some that Perl treats differently because of the way it handles
+# backtracking verbs.
+
+/(?!a(*COMMIT)b)ac|ad/
+ ac
+ 0: ac
+ ad
+ 0: ad
+
+/^(?!a(*THEN)b|ac)../
+ ad
+ 0: ad
+\= Expect no match
+ ac
+No match
+
+/^(?=a(*THEN)b|ac)/
+ ac
+ 0:
+
+/\A.*?(?:a|b(*THEN)c)/
+ ba
+ 0: ba
+
+/\A.*?(?:a|b(*THEN)c)++/
+ ba
+ 0: ba
+
+/\A.*?(?:a|b(*THEN)c|d)/
+ ba
+ 0: ba
+
+/(?:(a(*MARK:X)a+(*SKIP:X)b)){0}(?:(?1)|aac)/
+ aac
+ 0: aac
+
+/\A.*?(a|b(*THEN)c)/
+ ba
+ 0: ba
+ 1: a
+
+/^(A(*THEN)B|A(*THEN)D)/
+ AD
+ 0: AD
+ 1: AD
+
+/(?!b(*THEN)a)bn|bnn/
+ bnn
+ 0: bn
+
+/(?(?=b(*SKIP)a)bn|bnn)/
+ bnn
+ 0: bnn
+
+/(?=b(*THEN)a|)bn|bnn/
+ bnn
+ 0: bn
+
+# This test causes a segfault with Perl 5.18.0
+
+/^(?=(a)){0}b(?1)/
+ backgammon
+ 0: ba
+
+/(?|(?<n>f)|(?<n>b))/I,dupnames
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ n 1
+Options: dupnames
+Starting code units: b f
+Subject length lower bound = 1
+
+/(?<a>abc)(?<a>z)\k<a>()/IB,dupnames
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ abc
+ Ket
+ CBra 2
+ z
+ Ket
+ \k<a>2
+ CBra 3
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 3
+Max back reference = 2
+Named capturing subpatterns:
+ a 1
+ a 2
+Options: dupnames
+First code unit = 'a'
+Last code unit = 'z'
+Subject length lower bound = 5
+
+/a*[bcd]/B
+------------------------------------------------------------------
+ Bra
+ a*+
+ [b-d]
+ Ket
+ End
+------------------------------------------------------------------
+
+/[bcd]*a/B
+------------------------------------------------------------------
+ Bra
+ [b-d]*+
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+# A complete set of tests for auto-possessification of character types, but
+# omitting \C because it might be disabled (it has its own tests).
+
+/\D+\D \D+\d \D+\S \D+\s \D+\W \D+\w \D+. \D+\R \D+\H \D+\h \D+\V \D+\v \D+\Z \D+\z \D+$/Bx
+------------------------------------------------------------------
+ Bra
+ \D+
+ \D
+ \D++
+ \d
+ \D+
+ \S
+ \D+
+ \s
+ \D+
+ \W
+ \D+
+ \w
+ \D+
+ Any
+ \D+
+ \R
+ \D+
+ \H
+ \D+
+ \h
+ \D+
+ \V
+ \D+
+ \v
+ \D+
+ \Z
+ \D++
+ \z
+ \D+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\d+\D \d+\d \d+\S \d+\s \d+\W \d+\w \d+. \d+\R \d+\H \d+\h \d+\V \d+\v \d+\Z \d+\z \d+$/Bx
+------------------------------------------------------------------
+ Bra
+ \d++
+ \D
+ \d+
+ \d
+ \d+
+ \S
+ \d++
+ \s
+ \d++
+ \W
+ \d+
+ \w
+ \d+
+ Any
+ \d++
+ \R
+ \d+
+ \H
+ \d++
+ \h
+ \d+
+ \V
+ \d++
+ \v
+ \d++
+ \Z
+ \d++
+ \z
+ \d++
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\S+\D \S+\d \S+\S \S+\s \S+\W \S+\w \S+. \S+\R \S+\H \S+\h \S+\V \S+\v \S+\Z \S+\z \S+$/Bx
+------------------------------------------------------------------
+ Bra
+ \S+
+ \D
+ \S+
+ \d
+ \S+
+ \S
+ \S++
+ \s
+ \S+
+ \W
+ \S+
+ \w
+ \S+
+ Any
+ \S++
+ \R
+ \S+
+ \H
+ \S++
+ \h
+ \S+
+ \V
+ \S++
+ \v
+ \S++
+ \Z
+ \S++
+ \z
+ \S++
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\s+\D \s+\d \s+\S \s+\s \s+\W \s+\w \s+. \s+\R \s+\H \s+\h \s+\V \s+\v \s+\Z \s+\z \s+$/Bx
+------------------------------------------------------------------
+ Bra
+ \s+
+ \D
+ \s++
+ \d
+ \s++
+ \S
+ \s+
+ \s
+ \s+
+ \W
+ \s++
+ \w
+ \s+
+ Any
+ \s+
+ \R
+ \s+
+ \H
+ \s+
+ \h
+ \s+
+ \V
+ \s+
+ \v
+ \s+
+ \Z
+ \s++
+ \z
+ \s+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\W+\D \W+\d \W+\S \W+\s \W+\W \W+\w \W+. \W+\R \W+\H \W+\h \W+\V \W+\v \W+\Z \W+\z \W+$/Bx
+------------------------------------------------------------------
+ Bra
+ \W+
+ \D
+ \W++
+ \d
+ \W+
+ \S
+ \W+
+ \s
+ \W+
+ \W
+ \W++
+ \w
+ \W+
+ Any
+ \W+
+ \R
+ \W+
+ \H
+ \W+
+ \h
+ \W+
+ \V
+ \W+
+ \v
+ \W+
+ \Z
+ \W++
+ \z
+ \W+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\w+\D \w+\d \w+\S \w+\s \w+\W \w+\w \w+. \w+\R \w+\H \w+\h \w+\V \w+\v \w+\Z \w+\z \w+$/Bx
+------------------------------------------------------------------
+ Bra
+ \w+
+ \D
+ \w+
+ \d
+ \w+
+ \S
+ \w++
+ \s
+ \w++
+ \W
+ \w+
+ \w
+ \w+
+ Any
+ \w++
+ \R
+ \w+
+ \H
+ \w++
+ \h
+ \w+
+ \V
+ \w++
+ \v
+ \w++
+ \Z
+ \w++
+ \z
+ \w++
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\R+\D \R+\d \R+\S \R+\s \R+\W \R+\w \R+. \R+\R \R+\H \R+\h \R+\V \R+\v \R+\Z \R+\z \R+$/Bx
+------------------------------------------------------------------
+ Bra
+ \R+
+ \D
+ \R++
+ \d
+ \R+
+ \S
+ \R++
+ \s
+ \R+
+ \W
+ \R++
+ \w
+ \R++
+ Any
+ \R+
+ \R
+ \R+
+ \H
+ \R++
+ \h
+ \R+
+ \V
+ \R+
+ \v
+ \R+
+ \Z
+ \R++
+ \z
+ \R+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\H+\D \H+\d \H+\S \H+\s \H+\W \H+\w \H+. \H+\R \H+\H \H+\h \H+\V \H+\v \H+\Z \H+\z \H+$/Bx
+------------------------------------------------------------------
+ Bra
+ \H+
+ \D
+ \H+
+ \d
+ \H+
+ \S
+ \H+
+ \s
+ \H+
+ \W
+ \H+
+ \w
+ \H+
+ Any
+ \H+
+ \R
+ \H+
+ \H
+ \H++
+ \h
+ \H+
+ \V
+ \H+
+ \v
+ \H+
+ \Z
+ \H++
+ \z
+ \H+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\h+\D \h+\d \h+\S \h+\s \h+\W \h+\w \h+. \h+\R \h+\H \h+\h \h+\V \h+\v \h+\Z \h+\z \h+$/Bx
+------------------------------------------------------------------
+ Bra
+ \h+
+ \D
+ \h++
+ \d
+ \h++
+ \S
+ \h+
+ \s
+ \h+
+ \W
+ \h++
+ \w
+ \h+
+ Any
+ \h++
+ \R
+ \h++
+ \H
+ \h+
+ \h
+ \h+
+ \V
+ \h++
+ \v
+ \h+
+ \Z
+ \h++
+ \z
+ \h+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\V+\D \V+\d \V+\S \V+\s \V+\W \V+\w \V+. \V+\R \V+\H \V+\h \V+\V \V+\v \V+\Z \V+\z \V+$/Bx
+------------------------------------------------------------------
+ Bra
+ \V+
+ \D
+ \V+
+ \d
+ \V+
+ \S
+ \V+
+ \s
+ \V+
+ \W
+ \V+
+ \w
+ \V+
+ Any
+ \V++
+ \R
+ \V+
+ \H
+ \V+
+ \h
+ \V+
+ \V
+ \V++
+ \v
+ \V+
+ \Z
+ \V++
+ \z
+ \V+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\v+\D \v+\d \v+\S \v+\s \v+\W \v+\w \v+. \v+\R \v+\H \v+\h \v+\V \v+\v \v+\Z \v+\z \v+$/Bx
+------------------------------------------------------------------
+ Bra
+ \v+
+ \D
+ \v++
+ \d
+ \v++
+ \S
+ \v+
+ \s
+ \v+
+ \W
+ \v++
+ \w
+ \v+
+ Any
+ \v+
+ \R
+ \v+
+ \H
+ \v++
+ \h
+ \v++
+ \V
+ \v+
+ \v
+ \v+
+ \Z
+ \v++
+ \z
+ \v+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/ a+\D a+\d a+\S a+\s a+\W a+\w a+. a+\R a+\H a+\h a+\V a+\v a+\Z a+\z a+$/Bx
+------------------------------------------------------------------
+ Bra
+ a+
+ \D
+ a++
+ \d
+ a+
+ \S
+ a++
+ \s
+ a++
+ \W
+ a+
+ \w
+ a+
+ Any
+ a++
+ \R
+ a+
+ \H
+ a++
+ \h
+ a+
+ \V
+ a++
+ \v
+ a++
+ \Z
+ a++
+ \z
+ a++
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/\n+\D \n+\d \n+\S \n+\s \n+\W \n+\w \n+. \n+\R \n+\H \n+\h \n+\V \n+\v \n+\Z \n+\z \n+$/Bx
+------------------------------------------------------------------
+ Bra
+ \x0a+
+ \D
+ \x0a++
+ \d
+ \x0a++
+ \S
+ \x0a+
+ \s
+ \x0a+
+ \W
+ \x0a++
+ \w
+ \x0a+
+ Any
+ \x0a+
+ \R
+ \x0a+
+ \H
+ \x0a++
+ \h
+ \x0a++
+ \V
+ \x0a+
+ \v
+ \x0a+
+ \Z
+ \x0a++
+ \z
+ \x0a+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bx
+------------------------------------------------------------------
+ Bra
+ Any+
+ \D
+ Any+
+ \d
+ Any+
+ \S
+ Any+
+ \s
+ Any+
+ \W
+ Any+
+ \w
+ Any+
+ Any
+ Any++
+ \R
+ Any+
+ \H
+ Any+
+ \h
+ Any+
+ \V
+ Any+
+ \v
+ Any+
+ \Z
+ Any++
+ \z
+ Any+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bsx
+------------------------------------------------------------------
+ Bra
+ AllAny+
+ \D
+ AllAny+
+ \d
+ AllAny+
+ \S
+ AllAny+
+ \s
+ AllAny+
+ \W
+ AllAny+
+ \w
+ AllAny+
+ AllAny
+ AllAny+
+ \R
+ AllAny+
+ \H
+ AllAny+
+ \h
+ AllAny+
+ \V
+ AllAny+
+ \v
+ AllAny+
+ \Z
+ AllAny++
+ \z
+ AllAny+
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/ \D+$ \d+$ \S+$ \s+$ \W+$ \w+$ \R+$ \H+$ \h+$ \V+$ \v+$ a+$ \n+$ .+$ .+$/Bmx
+------------------------------------------------------------------
+ Bra
+ \D+
+ /m $
+ \d++
+ /m $
+ \S++
+ /m $
+ \s+
+ /m $
+ \W+
+ /m $
+ \w++
+ /m $
+ \R+
+ /m $
+ \H+
+ /m $
+ \h+
+ /m $
+ \V+
+ /m $
+ \v+
+ /m $
+ a+
+ /m $
+ \x0a+
+ /m $
+ Any+
+ /m $
+ Any+
+ /m $
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=a+)a(a+)++a/B
+------------------------------------------------------------------
+ Bra
+ Assert
+ a++
+ Ket
+ a
+ CBraPos 1
+ a+
+ KetRpos
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/a+(bb|cc)a+(?:bb|cc)a+(?>bb|cc)a+(?:bb|cc)+a+(aa)a+(?:bb|aa)/B
+------------------------------------------------------------------
+ Bra
+ a++
+ CBra 1
+ bb
+ Alt
+ cc
+ Ket
+ a++
+ Bra
+ bb
+ Alt
+ cc
+ Ket
+ a++
+ Once
+ bb
+ Alt
+ cc
+ Ket
+ a++
+ Bra
+ bb
+ Alt
+ cc
+ KetRmax
+ a+
+ CBra 2
+ aa
+ Ket
+ a+
+ Bra
+ bb
+ Alt
+ aa
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/a+(bb|cc)?#a+(?:bb|cc)??#a+(?:bb|cc)?+#a+(?:bb|cc)*#a+(bb|cc)?a#a+(?:aa)?/B
+------------------------------------------------------------------
+ Bra
+ a++
+ Brazero
+ CBra 1
+ bb
+ Alt
+ cc
+ Ket
+ #
+ a++
+ Braminzero
+ Bra
+ bb
+ Alt
+ cc
+ Ket
+ #
+ a++
+ Once
+ Brazero
+ Bra
+ bb
+ Alt
+ cc
+ Ket
+ Ket
+ #
+ a++
+ Brazero
+ Bra
+ bb
+ Alt
+ cc
+ KetRmax
+ #
+ a+
+ Brazero
+ CBra 2
+ bb
+ Alt
+ cc
+ Ket
+ a#
+ a+
+ Brazero
+ Bra
+ aa
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/a+(?:bb)?a#a+(?:|||)#a+(?:|b)a#a+(?:|||)?a/B
+------------------------------------------------------------------
+ Bra
+ a+
+ Brazero
+ Bra
+ bb
+ Ket
+ a#
+ a++
+ Bra
+ Alt
+ Alt
+ Alt
+ Ket
+ #
+ a+
+ Bra
+ Alt
+ b
+ Ket
+ a#
+ a+
+ Brazero
+ Bra
+ Alt
+ Alt
+ Alt
+ Ket
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/[ab]*/B
+------------------------------------------------------------------
+ Bra
+ [ab]*+
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: aaaa
+
+/[ab]*?/B
+------------------------------------------------------------------
+ Bra
+ [ab]*?
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0:
+
+/[ab]?/B
+------------------------------------------------------------------
+ Bra
+ [ab]?+
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: a
+
+/[ab]??/B
+------------------------------------------------------------------
+ Bra
+ [ab]??
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0:
+
+/[ab]+/B
+------------------------------------------------------------------
+ Bra
+ [ab]++
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: aaaa
+
+/[ab]+?/B
+------------------------------------------------------------------
+ Bra
+ [ab]+?
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: a
+
+/[ab]{2,3}/B
+------------------------------------------------------------------
+ Bra
+ [ab]{2,3}+
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: aaa
+
+/[ab]{2,3}?/B
+------------------------------------------------------------------
+ Bra
+ [ab]{2,3}?
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: aa
+
+/[ab]{2,}/B
+------------------------------------------------------------------
+ Bra
+ [ab]{2,}+
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: aaaa
+
+/[ab]{2,}?/B
+------------------------------------------------------------------
+ Bra
+ [ab]{2,}?
+ Ket
+ End
+------------------------------------------------------------------
+ aaaa
+ 0: aa
+
+/\d+\s{0,5}=\s*\S?=\w{0,4}\W*/B
+------------------------------------------------------------------
+ Bra
+ \d++
+ \s{0,5}+
+ =
+ \s*+
+ \S?
+ =
+ \w{0,4}+
+ \W*+
+ Ket
+ End
+------------------------------------------------------------------
+
+/[a-d]{5,12}[e-z0-9]*#[^a-z]+[b-y]*a[2-7]?[^0-9a-z]+/B
+------------------------------------------------------------------
+ Bra
+ [a-d]{5,12}+
+ [0-9e-z]*+
+ #
+ [\x00-`{-\xff] (neg)++
+ [b-y]*+
+ a
+ [2-7]?+
+ [\x00-/:-`{-\xff] (neg)++
+ Ket
+ End
+------------------------------------------------------------------
+
+/[a-z]*\s#[ \t]?\S#[a-c]*\S#[C-G]+?\d#[4-8]*\D#[4-9,]*\D#[!$]{0,5}\w#[M-Xf-l]+\W#[a-c,]?\W/B
+------------------------------------------------------------------
+ Bra
+ [a-z]*+
+ \s
+ #
+ [\x09 ]?+
+ \S
+ #
+ [a-c]*
+ \S
+ #
+ [C-G]++
+ \d
+ #
+ [4-8]*+
+ \D
+ #
+ [,4-9]*
+ \D
+ #
+ [!$]{0,5}+
+ \w
+ #
+ [M-Xf-l]++
+ \W
+ #
+ [,a-c]?
+ \W
+ Ket
+ End
+------------------------------------------------------------------
+
+/a+(aa|bb)*c#a*(bb|cc)*a#a?(bb|cc)*d#[a-f]*(g|hh)*f/B
+------------------------------------------------------------------
+ Bra
+ a+
+ Brazero
+ CBra 1
+ aa
+ Alt
+ bb
+ KetRmax
+ c#
+ a*
+ Brazero
+ CBra 2
+ bb
+ Alt
+ cc
+ KetRmax
+ a#
+ a?+
+ Brazero
+ CBra 3
+ bb
+ Alt
+ cc
+ KetRmax
+ d#
+ [a-f]*
+ Brazero
+ CBra 4
+ g
+ Alt
+ hh
+ KetRmax
+ f
+ Ket
+ End
+------------------------------------------------------------------
+
+/[a-f]*(g|hh|i)*i#[a-x]{4,}(y{0,6})*y#[a-k]+(ll|mm)+n/B
+------------------------------------------------------------------
+ Bra
+ [a-f]*+
+ Brazero
+ CBra 1
+ g
+ Alt
+ hh
+ Alt
+ i
+ KetRmax
+ i#
+ [a-x]{4,}
+ Brazero
+ SCBra 2
+ y{0,6}
+ KetRmax
+ y#
+ [a-k]++
+ CBra 3
+ ll
+ Alt
+ mm
+ KetRmax
+ n
+ Ket
+ End
+------------------------------------------------------------------
+
+/[a-f]*(?>gg|hh)+#[a-f]*(?>gg|hh)?#[a-f]*(?>gg|hh)*a#[a-f]*(?>gg|hh)*h/B
+------------------------------------------------------------------
+ Bra
+ [a-f]*+
+ Once
+ gg
+ Alt
+ hh
+ KetRmax
+ #
+ [a-f]*+
+ Brazero
+ Once
+ gg
+ Alt
+ hh
+ Ket
+ #
+ [a-f]*
+ Brazero
+ Once
+ gg
+ Alt
+ hh
+ KetRmax
+ a#
+ [a-f]*+
+ Brazero
+ Once
+ gg
+ Alt
+ hh
+ KetRmax
+ h
+ Ket
+ End
+------------------------------------------------------------------
+
+/[a-c]*d/IB
+------------------------------------------------------------------
+ Bra
+ [a-c]*+
+ d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: a b c d
+Last code unit = 'd'
+Subject length lower bound = 1
+
+/[a-c]+d/IB
+------------------------------------------------------------------
+ Bra
+ [a-c]++
+ d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: a b c
+Last code unit = 'd'
+Subject length lower bound = 2
+
+/[a-c]?d/IB
+------------------------------------------------------------------
+ Bra
+ [a-c]?+
+ d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: a b c d
+Last code unit = 'd'
+Subject length lower bound = 1
+
+/[a-c]{4,6}d/IB
+------------------------------------------------------------------
+ Bra
+ [a-c]{4,6}+
+ d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: a b c
+Last code unit = 'd'
+Subject length lower bound = 5
+
+/[a-c]{0,6}d/IB
+------------------------------------------------------------------
+ Bra
+ [a-c]{0,6}+
+ d
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Starting code units: a b c d
+Last code unit = 'd'
+Subject length lower bound = 1
+
+# End of special auto-possessive tests
+
+/^A\o{1239}B/
+Failed: error 164 at offset 8: non-octal character in \o{} (closing brace missing?)
+ A\123B
+
+/^A\oB/
+Failed: error 155 at offset 4: missing opening brace after \o
+
+/^A\x{zz}B/
+Failed: error 167 at offset 5: non-hex character in \x{} (closing brace missing?)
+
+/^A\x{12Z/
+Failed: error 167 at offset 7: non-hex character in \x{} (closing brace missing?)
+
+/^A\x{/
+Failed: error 178 at offset 5: digits missing in \x{} or \o{} or \N{U+}
+
+/[ab]++/B,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ [ab]++
+ Ket
+ End
+------------------------------------------------------------------
+
+/[^ab]*+/B,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ [\x00-`c-\xff] (neg)*+
+ Ket
+ End
+------------------------------------------------------------------
+
+/a{4}+/B,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ a{4}
+ Ket
+ End
+------------------------------------------------------------------
+
+/a{4}+/Bi,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ /i a{4}
+ Ket
+ End
+------------------------------------------------------------------
+
+/[a-[:digit:]]+/
+Failed: error 150 at offset 4: invalid range in character class
+
+/[A-[:digit:]]+/
+Failed: error 150 at offset 4: invalid range in character class
+
+/[a-[.xxx.]]+/
+Failed: error 150 at offset 4: invalid range in character class
+
+/[a-[=xxx=]]+/
+Failed: error 150 at offset 4: invalid range in character class
+
+/[a-[!xxx!]]+/
+Failed: error 108 at offset 3: range out of order in character class
+
+/[A-[!xxx!]]+/
+ A]]]
+ 0: A]]]
+
+/[a-\d]+/
+Failed: error 150 at offset 5: invalid range in character class
+
+/(?<0abc>xx)/
+Failed: error 144 at offset 3: group name must start with a non-digit
+
+/(?&1abc)xx(?<1abc>y)/
+Failed: error 144 at offset 3: group name must start with a non-digit
+
+/(?<ab-cd>xx)/
+Failed: error 142 at offset 5: syntax error in subpattern name (missing terminator)
+
+/(?'0abc'xx)/
+Failed: error 144 at offset 3: group name must start with a non-digit
+
+/(?P<0abc>xx)/
+Failed: error 144 at offset 4: group name must start with a non-digit
+
+/\k<5ghj>/
+Failed: error 144 at offset 3: group name must start with a non-digit
+
+/\k'5ghj'/
+Failed: error 144 at offset 3: group name must start with a non-digit
+
+/\k{2fgh}/
+Failed: error 144 at offset 3: group name must start with a non-digit
+
+/(?P=8yuki)/
+Failed: error 144 at offset 4: group name must start with a non-digit
+
+/\g{4df}/
+Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/(?&1abc)xx(?<1abc>y)/
+Failed: error 144 at offset 3: group name must start with a non-digit
+
+/(?P>1abc)xx(?<1abc>y)/
+Failed: error 144 at offset 4: group name must start with a non-digit
+
+/\g'3gh'/
+Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/\g<5fg>/
+Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/(?(<4gh>)abc)/
+Failed: error 144 at offset 4: group name must start with a non-digit
+
+/(?('4gh')abc)/
+Failed: error 144 at offset 4: group name must start with a non-digit
+
+/(?(4gh)abc)/
+Failed: error 124 at offset 4: missing closing parenthesis for condition
+
+/(?(R&6yh)abc)/
+Failed: error 144 at offset 5: group name must start with a non-digit
+
+/(((a\2)|(a*)\g<-1>))*a?/B
+------------------------------------------------------------------
+ Bra
+ Brazero
+ SCBra 1
+ Once
+ CBra 2
+ CBra 3
+ a
+ \2
+ Ket
+ Alt
+ CBra 4
+ a*
+ Ket
+ Recurse
+ Ket
+ Ket
+ KetRmax
+ a?+
+ Ket
+ End
+------------------------------------------------------------------
+
+# Test the ugly "start or end of word" compatibility syntax.
+
+/[[:<:]]red[[:>:]]/B
+------------------------------------------------------------------
+ Bra
+ \b
+ Assert
+ \w
+ Ket
+ red
+ \b
+ AssertB
+ Reverse
+ \w
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ little red riding hood
+ 0: red
+ a /red/ thing
+ 0: red
+ red is a colour
+ 0: red
+ put it all on red
+ 0: red
+\= Expect no match
+ no reduction
+No match
+ Alfred Winifred
+No match
+
+/[a[:<:]] should give error/
+Failed: error 130 at offset 4: unknown POSIX class name
+
+/(?=ab\K)/aftertext
+ abcd\=startchar
+Start of matched string is beyond its end - displaying from end to start.
+ 0: ab
+ 0+ abcd
+
+/abcd/newline=lf,firstline
+\= Expect no match
+ xx\nxabcd
+No match
+
+# Test stack guard external calls.
+
+/(((a)))/stackguard=1
+Failed: error 133 at offset 7: parentheses are too deeply nested (stack check)
+
+/(((a)))/stackguard=2
+Failed: error 133 at offset 7: parentheses are too deeply nested (stack check)
+
+/(((a)))/stackguard=3
+
+/(((((a)))))/
+
+# End stack guard tests
+
+/^\w+(?>\s*)(?<=\w)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ \w+
+ Once
+ \s*+
+ Ket
+ AssertB
+ Reverse
+ \w
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/\othing/
+Failed: error 155 at offset 2: missing opening brace after \o
+
+/\o{}/
+Failed: error 178 at offset 3: digits missing in \x{} or \o{} or \N{U+}
+
+/\o{whatever}/
+Failed: error 164 at offset 3: non-octal character in \o{} (closing brace missing?)
+
+/\xthing/
+
+/\x{}/
+Failed: error 178 at offset 3: digits missing in \x{} or \o{} or \N{U+}
+
+/\x{whatever}/
+Failed: error 167 at offset 3: non-hex character in \x{} (closing brace missing?)
+
+/A\8B/
+Failed: error 115 at offset 2: reference to non-existent subpattern
+
+/A\9B/
+Failed: error 115 at offset 2: reference to non-existent subpattern
+
+# This one is here because Perl fails to match "12" for this pattern when the $
+# is present.
+
+/^(?(?=abc)\w{3}:|\d\d)$/
+ abc:
+ 0: abc:
+ 12
+ 0: 12
+\= Expect no match
+ 123
+No match
+ xyz
+No match
+
+# Perl gets this one wrong, giving "a" as the after text for ca and failing to
+# match for cd.
+
+/(?(?=ab)ab)/aftertext
+ abxxx
+ 0: ab
+ 0+ xxx
+ ca
+ 0:
+ 0+ ca
+ cd
+ 0:
+ 0+ cd
+
+# This should test both paths for processing OP_RECURSE.
+
+/(?(R)a+|(?R)b)/
+ aaaabcde
+ 0: aaaab
+ aaaabcde\=ovector=100
+ 0: aaaab
+
+/a*?b*?/
+ ab
+ 0:
+
+/(*NOTEMPTY)a*?b*?/
+ ab
+ 0: a
+ ba
+ 0: b
+ cb
+ 0: b
+
+/(*NOTEMPTY_ATSTART)a*?b*?/aftertext
+ ab
+ 0: a
+ 0+ b
+ cdab
+ 0:
+ 0+ dab
+
+/(?(VERSION>=10.0)yes|no)/I
+Capturing subpattern count = 0
+Subject length lower bound = 2
+ yesno
+ 0: yes
+
+/(?(VERSION>=10.04)yes|no)/
+ yesno
+ 0: yes
+
+/(?(VERSION=8)yes){3}/BI,aftertext
+------------------------------------------------------------------
+ Bra
+ Cond
+ Cond false
+ yes
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+ yesno
+ 0:
+ 0+ yesno
+
+/(?(VERSION=8)yes|no){3}/I
+Capturing subpattern count = 0
+Subject length lower bound = 6
+ yesnononoyes
+ 0: nonono
+\= Expect no match
+ yesno
+No match
+
+/(?:(?<VERSION>abc)|xyz)(?(VERSION)yes|no)/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ VERSION 1
+Starting code units: a x
+Subject length lower bound = 5
+ abcyes
+ 0: abcyes
+ 1: abc
+ xyzno
+ 0: xyzno
+\= Expect no match
+ abcno
+No match
+ xyzyes
+No match
+
+/(?(VERSION<10)yes|no)/
+Failed: error 179 at offset 10: syntax error or number too big in (?(VERSION condition
+
+/(?(VERSION>10)yes|no)/
+Failed: error 179 at offset 11: syntax error or number too big in (?(VERSION condition
+
+/(?(VERSION>=10.0.0)yes|no)/
+Failed: error 179 at offset 16: syntax error or number too big in (?(VERSION condition
+
+/(?(VERSION=10.101)yes|no)/
+Failed: error 179 at offset 16: syntax error or number too big in (?(VERSION condition
+
+/abcd/I
+Capturing subpattern count = 0
+First code unit = 'a'
+Last code unit = 'd'
+Subject length lower bound = 4
+
+/abcd/I,no_start_optimize
+Capturing subpattern count = 0
+Options: no_start_optimize
+Subject length lower bound = 0
+
+/(|ab)*?d/I
+Capturing subpattern count = 1
+Starting code units: a d
+Last code unit = 'd'
+Subject length lower bound = 1
+ abd
+ 0: abd
+ 1: ab
+ xyd
+ 0: d
+
+/(|ab)*?d/I,no_start_optimize
+Capturing subpattern count = 1
+Options: no_start_optimize
+Subject length lower bound = 0
+ abd
+ 0: abd
+ 1: ab
+ xyd
+ 0: d
+
+/\k<A>*(?<A>aa)(?<A>bb)/match_unset_backref,dupnames
+ aabb
+ 0: aabb
+ 1: aa
+ 2: bb
+
+/(((((a)))))/parens_nest_limit=2
+Failed: error 119 at offset 3: parentheses are too deeply nested
+
+/abc/replace=XYZ
+ 123123
+ 0: 123123
+ 123abc123
+ 1: 123XYZ123
+ 123abc123abc123
+ 1: 123XYZ123abc123
+ 123123\=zero_terminate
+ 0: 123123
+ 123abc123\=zero_terminate
+ 1: 123XYZ123
+ 123abc123abc123\=zero_terminate
+ 1: 123XYZ123abc123
+
+/abc/g,replace=XYZ
+ 123abc123
+ 1: 123XYZ123
+ 123abc123abc123
+ 2: 123XYZ123XYZ123
+
+/abc/replace=X$$Z
+ 123abc123
+ 1: 123X$Z123
+
+/abc/g,replace=X$$Z
+ 123abc123abc123
+ 2: 123X$Z123X$Z123
+
+/a(b)c(d)e/replace=X$1Y${2}Z
+ "abcde"
+ 1: "XbYdZ"
+
+/a(b)c(d)e/replace=X$1Y${2}Z,global
+ "abcde-abcde"
+ 2: "XbYdZ-XbYdZ"
+
+/a(?<ONE>b)c(?<TWO>d)e/replace=X$ONE+${TWO}Z
+ "abcde"
+ 1: "Xb+dZ"
+
+/a(?<ONE>b)c(?<TWO>d)e/g,replace=X$ONE+${TWO}Z
+ "abcde-abcde-"
+ 2: "Xb+dZ-Xb+dZ-"
+
+/abc/replace=a$++
+ 123abc
+Failed: error -35 at offset 2 in replacement: invalid replacement string
+
+/abc/replace=a$bad
+ 123abc
+Failed: error -49 at offset 5 in replacement: unknown substring
+
+/abc/replace=a${A234567890123456789_123456789012}z
+ 123abc
+Failed: error -49 at offset 36 in replacement: unknown substring
+
+/abc/replace=a${A23456789012345678901234567890123}z
+ 123abc
+Failed: error -35 at offset 35 in replacement: invalid replacement string
+
+/abc/replace=a${bcd
+ 123abc
+Failed: error -58 at offset 6 in replacement: expected closing curly bracket in replacement string
+
+/abc/replace=a${b+d}z
+ 123abc
+Failed: error -58 at offset 4 in replacement: expected closing curly bracket in replacement string
+
+/abc/replace=[10]XYZ
+ 123abc123
+ 1: 123XYZ123
+
+/abc/replace=[9]XYZ
+ 123abc123
+Failed: error -48: no more memory
+
+/abc/replace=xyz
+ 1abc2\=partial_hard
+Failed: error -34: bad option value
+
+/abc/replace=xyz
+ 123abc456
+ 1: 123xyz456
+ 123abc456\=replace=pqr
+ 1: 123pqr456
+ 123abc456abc789
+ 1: 123xyz456abc789
+ 123abc456abc789\=g
+ 2: 123xyz456xyz789
+
+/(?<=abc)(|def)/g,replace=<$0>
+ 123abcxyzabcdef789abcpqr
+ 4: 123abc<>xyzabc<><def>789abc<>pqr
+
+/./replace=$0
+ a
+ 1: a
+
+/(.)(.)/replace=$2+$1
+ abc
+ 1: b+ac
+
+/(?<A>.)(?<B>.)/replace=$B+$A
+ abc
+ 1: b+ac
+
+/(.)(.)/g,replace=$2$1
+ abcdefgh
+ 4: badcfehg
+
+/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=${*MARK}
+ apple lemon blackberry
+ 3: pear orange strawberry
+ apple strudel
+ 1: pear strudel
+ fruitless
+ 0: fruitless
+
+/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/replace=${*MARK} sauce,
+ apple lemon blackberry
+ 1: pear sauce lemon blackberry
+
+/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=<$*MARK>
+ apple lemon blackberry
+ 3: <pear> <orange> <strawberry>
+ apple strudel
+ 1: <pear> strudel
+ fruitless
+ 0: fruitless
+
+/(*:pear)apple/g,replace=${*MARKING}
+ apple lemon blackberry
+Failed: error -35 at offset 11 in replacement: invalid replacement string
+
+/(*:pear)apple/g,replace=${*MARK-time
+ apple lemon blackberry
+Failed: error -58 at offset 7 in replacement: expected closing curly bracket in replacement string
+
+/(*:pear)apple/g,replace=${*mark}
+ apple lemon blackberry
+Failed: error -35 at offset 8 in replacement: invalid replacement string
+
+/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=<$*MARKET>
+ apple lemon blackberry
+Failed: error -35 at offset 9 in replacement: invalid replacement string
+
+/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=[22]${*MARK}
+ apple lemon blackberry
+Failed: error -48: no more memory
+ apple lemon blackberry\=substitute_overflow_length
+Failed: error -48: no more memory: 23 code units are needed
+
+/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=[23]${*MARK}
+ apple lemon blackberry
+ 3: pear orange strawberry
+
+/abc/
+ 123abc123\=replace=[9]XYZ
+Failed: error -48: no more memory
+ 123abc123\=substitute_overflow_length,replace=[9]XYZ
+Failed: error -48: no more memory: 10 code units are needed
+ 123abc123\=substitute_overflow_length,replace=[6]XYZ
+Failed: error -48: no more memory: 10 code units are needed
+ 123abc123\=substitute_overflow_length,replace=[1]XYZ
+Failed: error -48: no more memory: 10 code units are needed
+ 123abc123\=substitute_overflow_length,replace=[0]XYZ
+Failed: error -48: no more memory: 10 code units are needed
+
+/a(b)c/
+ 123abc123\=replace=[9]x$1z
+Failed: error -48: no more memory
+ 123abc123\=substitute_overflow_length,replace=[9]x$1z
+Failed: error -48: no more memory: 10 code units are needed
+ 123abc123\=substitute_overflow_length,replace=[6]x$1z
+Failed: error -48: no more memory: 10 code units are needed
+ 123abc123\=substitute_overflow_length,replace=[1]x$1z
+Failed: error -48: no more memory: 10 code units are needed
+ 123abc123\=substitute_overflow_length,replace=[0]x$1z
+Failed: error -48: no more memory: 10 code units are needed
+
+"((?=(?(?=(?(?=(?(?=()))))))))"
+ a
+ 0:
+ 1:
+ 2:
+
+"(?(?=)==)(((((((((?=)))))))))"
+\= Expect no match
+ a
+No match
+
+/(a)(b)|(c)/
+ XcX\=ovector=2,get=1,get=2,get=3,get=4,getall
+Matched, but too many substrings
+ 0: c
+ 1: <unset>
+Get substring 1 failed (-55): requested value is not set
+Get substring 2 failed (-54): requested value is not available
+Get substring 3 failed (-54): requested value is not available
+Get substring 4 failed (-49): unknown substring
+ 0L c
+ 1L
+
+/x(?=ab\K)/
+ xab\=get=0
+Start of matched string is beyond its end - displaying from end to start.
+ 0: ab
+ 0G (0)
+ xab\=copy=0
+Start of matched string is beyond its end - displaying from end to start.
+ 0: ab
+ 0C (0)
+ xab\=getall
+Start of matched string is beyond its end - displaying from end to start.
+ 0: ab
+ 0L
+
+/(?<A>a)|(?<A>b)/dupnames
+ a\=ovector=1,copy=A,get=A,get=2
+Matched, but too many substrings
+ 0: a
+Copy substring 'A' failed (-54): requested value is not available
+Get substring 2 failed (-54): requested value is not available
+Get substring 'A' failed (-54): requested value is not available
+ a\=ovector=2,copy=A,get=A,get=2
+ 0: a
+ 1: a
+ C a (1) A (non-unique)
+Get substring 2 failed (-54): requested value is not available
+ G a (1) A (non-unique)
+ b\=ovector=2,copy=A,get=A,get=2
+Matched, but too many substrings
+ 0: b
+ 1: <unset>
+Copy substring 'A' failed (-55): requested value is not set
+Get substring 2 failed (-54): requested value is not available
+Get substring 'A' failed (-55): requested value is not set
+
+/a(b)c(d)/
+ abc\=ph,copy=0,copy=1,getall
+Partial match: abc
+ 0C abc (3)
+Copy substring 1 failed (-2): partial match
+get substring list failed (-2): partial match
+
+/^abc/info
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Subject length lower bound = 3
+
+/^abc/info,no_dotstar_anchor
+Capturing subpattern count = 0
+Compile options: no_dotstar_anchor
+Overall options: anchored no_dotstar_anchor
+First code unit = 'a'
+Subject length lower bound = 3
+
+/.*\d/info,auto_callout
+Capturing subpattern count = 0
+Options: auto_callout
+First code unit at start or follows newline
+Subject length lower bound = 1
+\= Expect no match
+ aaa
+--->aaa
+ +0 ^ .*
+ +2 ^ ^ \d
+ +2 ^ ^ \d
+ +2 ^^ \d
+ +2 ^ \d
+No match
+
+/.*\d/info,no_dotstar_anchor,auto_callout
+Capturing subpattern count = 0
+Options: auto_callout no_dotstar_anchor
+Subject length lower bound = 1
+\= Expect no match
+ aaa
+--->aaa
+ +0 ^ .*
+ +2 ^ ^ \d
+ +2 ^ ^ \d
+ +2 ^^ \d
+ +2 ^ \d
+ +0 ^ .*
+ +2 ^ ^ \d
+ +2 ^^ \d
+ +2 ^ \d
+ +0 ^ .*
+ +2 ^^ \d
+ +2 ^ \d
+No match
+
+/.*\d/dotall,info
+Capturing subpattern count = 0
+Compile options: dotall
+Overall options: anchored dotall
+Subject length lower bound = 1
+
+/.*\d/dotall,no_dotstar_anchor,info
+Capturing subpattern count = 0
+Options: dotall no_dotstar_anchor
+Subject length lower bound = 1
+
+/(*NO_DOTSTAR_ANCHOR)(?s).*\d/info
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: no_dotstar_anchor
+Subject length lower bound = 1
+
+'^(?:(a)|b)(?(1)A|B)'
+ aA123\=ovector=1
+Matched, but too many substrings
+ 0: aA
+ aA123\=ovector=2
+ 0: aA
+ 1: a
+
+'^(?:(?<AA>a)|b)(?(<AA>)A|B)'
+ aA123\=ovector=1
+Matched, but too many substrings
+ 0: aA
+ aA123\=ovector=2
+ 0: aA
+ 1: a
+
+'^(?<AA>)(?:(?<AA>a)|b)(?(<AA>)A|B)'dupnames
+ aA123\=ovector=1
+Matched, but too many substrings
+ 0: aA
+ aA123\=ovector=2
+Matched, but too many substrings
+ 0: aA
+ 1:
+ aA123\=ovector=3
+ 0: aA
+ 1:
+ 2: a
+
+'^(?:(?<AA>X)|)(?:(?<AA>a)|b)\k{AA}'dupnames
+ aa123\=ovector=1
+Matched, but too many substrings
+ 0: aa
+ aa123\=ovector=2
+Matched, but too many substrings
+ 0: aa
+ 1: <unset>
+ aa123\=ovector=3
+ 0: aa
+ 1: <unset>
+ 2: a
+
+/(?<N111>(?J)(?<N111>1(111111)11|)1|1|)(?(<N111>)1)/
+
+/(?<N>(?J)(?<N>))(?-J)\k<N>/
+
+# Quantifiers are not allowed on condition assertions, but are otherwise
+# OK in conditions.
+
+/(?(?=0)?)+/
+Failed: error 109 at offset 7: quantifier does not follow a repeatable item
+
+/(?(?=0)(?=00)?00765)/
+ 00765
+ 0: 00765
+
+/(?(?=0)(?=00)?00765|(?!3).56)/
+ 00765
+ 0: 00765
+ 456
+ 0: 456
+\= Expect no match
+ 356
+No match
+
+'^(a)*+(\w)'
+ g
+ 0: g
+ 1: <unset>
+ 2: g
+ g\=ovector=1
+Matched, but too many substrings
+ 0: g
+
+'^(?:a)*+(\w)'
+ g
+ 0: g
+ 1: g
+ g\=ovector=1
+Matched, but too many substrings
+ 0: g
+
+# These two pattern showeds up compile-time bugs
+
+"((?2){0,1999}())?"
+
+/((?+1)(\1))/B
+------------------------------------------------------------------
+ Bra
+ Once
+ CBra 1
+ Recurse
+ CBra 2
+ \1
+ Ket
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+# Callouts with string arguments
+
+/a(?C"/
+Failed: error 181 at offset 4: missing terminating delimiter for callout with string argument
+
+/a(?C"a/
+Failed: error 181 at offset 4: missing terminating delimiter for callout with string argument
+
+/a(?C"a"/
+Failed: error 139 at offset 7: closing parenthesis for (?C expected
+
+/a(?C"a"bcde(?C"b")xyz/
+Failed: error 139 at offset 7: closing parenthesis for (?C expected
+
+/a(?C"a)b""c")/B
+------------------------------------------------------------------
+ Bra
+ a
+ CalloutStr "a)b"c" 5 13 0
+ Ket
+ End
+------------------------------------------------------------------
+
+/ab(?C" any text with spaces ")cde/B
+------------------------------------------------------------------
+ Bra
+ ab
+ CalloutStr " any text with spaces " 6 30 1
+ cde
+ Ket
+ End
+------------------------------------------------------------------
+ abcde
+Callout (6): " any text with spaces "
+--->abcde
+ ^ ^ c
+ 0: abcde
+ 12abcde
+Callout (6): " any text with spaces "
+--->12abcde
+ ^ ^ c
+ 0: abcde
+
+/^a(b)c(?C1)def/
+ abcdef
+--->abcdef
+ 1 ^ ^ d
+ 0: abcdef
+ 1: b
+
+/^a(b)c(?C"AB")def/
+ abcdef
+Callout (10): "AB"
+--->abcdef
+ ^ ^ d
+ 0: abcdef
+ 1: b
+
+/^a(b)c(?C1)def/
+ abcdef\=callout_capture
+Callout 1: last capture = 1
+ 1: b
+--->abcdef
+ ^ ^ d
+ 0: abcdef
+ 1: b
+
+/^a(b)c(?C{AB})def/B
+------------------------------------------------------------------
+ Bra
+ ^
+ a
+ CBra 1
+ b
+ Ket
+ c
+ CalloutStr {AB} 10 14 1
+ def
+ Ket
+ End
+------------------------------------------------------------------
+ abcdef\=callout_capture
+Callout (10): {AB} last capture = 1
+ 1: b
+--->abcdef
+ ^ ^ d
+ 0: abcdef
+ 1: b
+
+/(?C`a``b`)(?C'a''b')(?C"a""b")(?C^a^^b^)(?C%a%%b%)(?C#a##b#)(?C$a$$b$)(?C{a}}b})/B,callout_info
+------------------------------------------------------------------
+ Bra
+ CalloutStr `a`b` 4 10 0
+ CalloutStr 'a'b' 14 20 0
+ CalloutStr "a"b" 24 30 0
+ CalloutStr ^a^b^ 34 40 0
+ CalloutStr %a%b% 44 50 0
+ CalloutStr #a#b# 54 60 0
+ CalloutStr $a$b$ 64 70 0
+ CalloutStr {a}b} 74 80 0
+ Ket
+ End
+------------------------------------------------------------------
+Callout `a`b` (
+Callout 'a'b' (
+Callout "a"b" (
+Callout ^a^b^ (
+Callout %a%b% (
+Callout #a#b# (
+Callout $a$b$ (
+Callout {a}b}
+
+/(?:a(?C`code`)){3}/B
+------------------------------------------------------------------
+ Bra
+ Bra
+ a
+ CalloutStr `code` 8 14 4
+ Ket
+ Bra
+ a
+ CalloutStr `code` 8 14 4
+ Ket
+ Bra
+ a
+ CalloutStr `code` 8 14 4
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(?(?C25)(?=abc)abcd|xyz)/B,callout_info
+------------------------------------------------------------------
+ Bra
+ ^
+ Cond
+ Callout 25 9 3
+ Assert
+ abc
+ Ket
+ abcd
+ Alt
+ xyz
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Callout 25 (?=
+ abcdefg
+--->abcdefg
+ 25 ^ (?=
+ 0: abcd
+ xyz123
+--->xyz123
+ 25 ^ (?=
+ 0: xyz
+
+/^(?(?C$abc$)(?=abc)abcd|xyz)/B
+------------------------------------------------------------------
+ Bra
+ ^
+ Cond
+ CalloutStr $abc$ 7 12 3
+ Assert
+ abc
+ Ket
+ abcd
+ Alt
+ xyz
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+ abcdefg
+Callout (7): $abc$
+--->abcdefg
+ ^ (?=
+ 0: abcd
+ xyz123
+Callout (7): $abc$
+--->xyz123
+ ^ (?=
+ 0: xyz
+
+/^ab(?C'first')cd(?C"second")ef/
+ abcdefg
+Callout (7): 'first'
+--->abcdefg
+ ^ ^ c
+Callout (20): "second"
+--->abcdefg
+ ^ ^ e
+ 0: abcdef
+
+/(?:a(?C`code`)){3}X/
+ aaaXY
+Callout (8): `code`
+--->aaaXY
+ ^^ ){3}
+Callout (8): `code`
+--->aaaXY
+ ^ ^ ){3}
+Callout (8): `code`
+--->aaaXY
+ ^ ^ ){3}
+ 0: aaaX
+
+# Binary zero in callout string
+# a ( ? C ' x z ' ) b
+/ 61 28 3f 43 27 78 00 7a 27 29 62/hex,callout_info
+Callout 'x\x00z' b
+ abcdefgh
+Callout (5): 'x\x00z'
+--->abcdefgh
+ ^^ b
+ 0: ab
+
+/(?(?!)^)/
+
+/(?(?!)a|b)/
+ bbb
+ 0: b
+\= Expect no match
+ aaa
+No match
+
+# JIT gives a different error message for the infinite recursion
+
+"(*NO_JIT)((?2)+)((?1)){"
+ abcd{
+Failed: error -52: nested recursion at the same subject position
+
+# Perl fails to diagnose the absence of an assertion
+
+"(?(?<E>.*!.*)?)"
+Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
+
+"X((?2)()*+){2}+"B
+------------------------------------------------------------------
+ Bra
+ X
+ Once
+ CBra 1
+ Recurse
+ Braposzero
+ SCBraPos 2
+ KetRpos
+ Ket
+ CBra 1
+ Recurse
+ Braposzero
+ SCBraPos 2
+ KetRpos
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+"X((?2)()*+){2}"B
+------------------------------------------------------------------
+ Bra
+ X
+ CBra 1
+ Recurse
+ Braposzero
+ SCBraPos 2
+ KetRpos
+ Ket
+ CBra 1
+ Recurse
+ Braposzero
+ SCBraPos 2
+ KetRpos
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?<=\bABQ(3(?-7)))/
+Failed: error 115 at offset 15: reference to non-existent subpattern
+
+/(?<=\bABQ(3(?+7)))/
+Failed: error 115 at offset 15: reference to non-existent subpattern
+
+";(?<=()((?3))((?2)))"
+Failed: error 125 at offset 1: lookbehind assertion is not fixed length
+
+# Perl loops on this (PCRE2 used to!)
+
+/(?<=\Ka)/g,aftertext
+ aaaaa
+ 0: a
+ 0+ aaaa
+ 0: a
+ 0+ aaa
+ 0: a
+ 0+ aa
+ 0: a
+ 0+ a
+ 0: a
+ 0+
+
+/(?<=\Ka)/altglobal,aftertext
+ aaaaa
+ 0: a
+ 0+ aaaa
+ 0: a
+ 0+ aaa
+ 0: a
+ 0+ aa
+ 0: a
+ 0+ a
+ 0: a
+ 0+
+
+/((?2){73}(?2))((?1))/info
+Capturing subpattern count = 2
+May match empty string
+Subject length lower bound = 0
+
+/abc/
+\= Expect no match
+ \[9x!xxx(]{9999}
+No match
+
+/(abc)*/
+ \[abc]{5}
+ 0: abcabcabcabcabc
+ 1: abc
+
+/^/gm
+ \n\n\n
+ 0:
+ 0:
+ 0:
+
+/^/gm,alt_circumflex
+ \n\n\n
+ 0:
+ 0:
+ 0:
+ 0:
+
+/((((((((x))))))))\81/
+Failed: error 115 at offset 19: reference to non-existent subpattern
+ xx1
+
+/((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))\80/
+ xx
+Matched, but too many substrings
+ 0: xx
+ 1: x
+ 2: x
+ 3: x
+ 4: x
+ 5: x
+ 6: x
+ 7: x
+ 8: x
+ 9: x
+10: x
+11: x
+12: x
+13: x
+14: x
+
+/\80/
+Failed: error 115 at offset 2: reference to non-existent subpattern
+
+/A\8B\9C/
+Failed: error 115 at offset 2: reference to non-existent subpattern
+ A8B9C
+
+/(?x:((?'a')) # comment (with parentheses) and | vertical
+(?-x:#not a comment (?'b')) # this is a comment ()
+(?'c')) # not a comment (?'d')/info
+Capturing subpattern count = 5
+Named capturing subpatterns:
+ a 2
+ b 3
+ c 4
+ d 5
+First code unit = '#'
+Last code unit = ' '
+Subject length lower bound = 32
+
+/(?|(?'a')(2)(?'b')|(?'a')(?'a')(3))/I,dupnames
+Capturing subpattern count = 3
+Named capturing subpatterns:
+ a 1
+ a 2
+ b 3
+Options: dupnames
+Starting code units: 2 3
+Subject length lower bound = 1
+ A23B
+ 0: 2
+ 1:
+ 2: 2
+ 3:
+ B32A
+ 0: 3
+ 1:
+ 2:
+ 3: 3
+
+# These are some patterns that used to cause buffer overflows or other errors
+# while compiling.
+
+/.((?2)(?R)|\1|$)()/B
+------------------------------------------------------------------
+ Bra
+ Any
+ Once
+ CBra 1
+ Recurse
+ Recurse
+ Alt
+ \1
+ Alt
+ $
+ Ket
+ Ket
+ CBra 2
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/.((?3)(?R)()(?2)|\1|$)()/B
+------------------------------------------------------------------
+ Bra
+ Any
+ Once
+ CBra 1
+ Recurse
+ Recurse
+ CBra 2
+ Ket
+ Recurse
+ Alt
+ \1
+ Alt
+ $
+ Ket
+ Ket
+ CBra 3
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(\9*+(?2);\3++()2|)++{/
+Failed: error 115 at offset 2: reference to non-existent subpattern
+
+/\V\x85\9*+((?2)\3++()2)*:2/
+Failed: error 115 at offset 7: reference to non-existent subpattern
+
+/(((?(R)){0,2}) (?'x'((?'R')((?'R')))))/dupnames
+
+/(((?(X)){0,2}) (?'x'((?'X')((?'X')))))/dupnames
+
+/(((?(R)){0,2}) (?'x'((?'X')((?'R')))))/
+
+"(?J)(?'d'(?'d'\g{d}))"
+
+"(?=!((?2)(?))({8(?<=(?1){29}8bbbb\x16\xd\xc6^($(\xa9H4){4}h}?1)B))\x15')"
+Failed: error 125 at offset 16: lookbehind assertion is not fixed length
+
+/A(?'')Z/
+Failed: error 162 at offset 4: subpattern name expected
+
+"(?J:(?|(?'R')(\k'R')|((?'R'))))"
+
+/(?<=|(\,\$(?73591620449005828816)\xa8.{7}){6}\x09)/
+Failed: error 161 at offset 17: group number is too big
+
+/^(?:(?(1)x|)+)+$()/B
+------------------------------------------------------------------
+ Bra
+ ^
+ SBra
+ SCond
+ 1 Cond ref
+ x
+ Alt
+ KetRmax
+ KetRmax
+ $
+ CBra 1
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/[[:>:]](?<)/
+Failed: error 162 at offset 10: subpattern name expected
+
+/((?x)(*:0))#(?'/
+Failed: error 162 at offset 15: subpattern name expected
+
+/(?C$[$)(?<]/
+Failed: error 162 at offset 10: subpattern name expected
+
+/(?C$)$)(?<]/
+Failed: error 162 at offset 10: subpattern name expected
+
+/(?(R))*+/B
+------------------------------------------------------------------
+ Bra
+ Braposzero
+ SBraPos
+ SCond
+ Cond recurse any
+ Ket
+ KetRpos
+ Ket
+ End
+------------------------------------------------------------------
+ abcd
+ 0:
+
+/((?x)(?#))#(?'/
+Failed: error 162 at offset 14: subpattern name expected
+
+/((?x)(?#))#(?'abc')/I
+Capturing subpattern count = 2
+Named capturing subpatterns:
+ abc 2
+First code unit = '#'
+Subject length lower bound = 1
+
+/[[:\\](?<[::]/
+Failed: error 162 at offset 9: subpattern name expected
+
+/[[:\\](?'abc')[a:]/I
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ abc 1
+Starting code units: : [ \
+Subject length lower bound = 2
+
+"[[[.\xe8Nq\xffq\xff\xe0\x2|||::Nq\xffq\xff\xe0\x6\x2|||::[[[:[::::::[[[[[::::::::[:[[[:[:::[[[[[[[[[[[[:::::::::::::::::[[.\xe8Nq\xffq\xff\xe0\x2|||::Nq\xffq\xff\xe0\x6\x2|||::[[[:[::::::[[[[[::::::::[:[[[:[:::[[[[[[[[[[[[[[:::E[[[:[:[[:[:::[[:::E[[[:[:[[:'[:::::E[[[:[::::::[[[:[[[[[[[::E[[[:[::::::[[[:[[[[[[[[:[[::[::::[[:::::::[[:[[[[[[[:[[::[:[[:[~"
+Failed: error 106 at offset 353: missing terminating ] for character class
+
+/()(?(R)0)*+/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ Ket
+ Braposzero
+ SBraPos
+ SCond
+ Cond recurse any
+ 0
+ Ket
+ KetRpos
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?R-:(?</
+Failed: error 158 at offset 3: (?R (recursive pattern call) must be followed by a closing parenthesis
+
+/(?R-:(?<)/
+Failed: error 158 at offset 3: (?R (recursive pattern call) must be followed by a closing parenthesis
+
+/(?(?C{\Q})(?!(?'/
+Failed: error 162 at offset 16: subpattern name expected
+
+/(?(?C{\Q})(?!(?'abc')))/I
+Capturing subpattern count = 1
+Named capturing subpatterns:
+ abc 1
+May match empty string
+Subject length lower bound = 0
+
+/(?1){3918}(((((0(\k'R'))))(?J)(?'R'(?'R'\3){99})))/I
+Capturing subpattern count = 8
+Max back reference = 8
+Named capturing subpatterns:
+ R 7
+ R 8
+Duplicate name status changes
+Last code unit = '0'
+Subject length lower bound = 65535
+
+/(?|(aaa)|(b))\g{1}/I
+Capturing subpattern count = 1
+Max back reference = 1
+Starting code units: a b
+Subject length lower bound = 0
+
+/(?|(aaa)|(b))(?1)/I
+Capturing subpattern count = 1
+Starting code units: a b
+Subject length lower bound = 4
+
+/(?|(aaa)|(b))/I
+Capturing subpattern count = 1
+Starting code units: a b
+Subject length lower bound = 1
+
+/(?|(?'a'aaa)|(?'a'b))\k'a'/I
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+ a 1
+Starting code units: a b
+Subject length lower bound = 0
+
+/(?|(?'a'aaa)|(?'a'b))(?'a'cccc)\k'a'/I,dupnames
+Capturing subpattern count = 2
+Max back reference = 2
+Named capturing subpatterns:
+ a 1
+ a 2
+Options: dupnames
+Starting code units: a b
+Last code unit = 'c'
+Subject length lower bound = 0
+
+/ab{3cd/
+ ab{3cd
+ 0: ab{3cd
+
+/ab{3,cd/
+ ab{3,cd
+ 0: ab{3,cd
+
+/ab{3,4a}cd/
+ ab{3,4a}cd
+ 0: ab{3,4a}cd
+
+/{4,5a}bc/
+ {4,5a}bc
+ 0: {4,5a}bc
+
+/\x0{ab}/
+ \0{ab}
+ 0: \x00{ab}
+
+/^(a(b))\1\g1\g{1}\g-1\g{-1}\g{-02}Z/
+ ababababbbabZXXXX
+ 0: ababababbbabZ
+ 1: ab
+ 2: b
+
+/.*?a(*PRUNE)b/
+ aab
+ 0: ab
+
+/.*?a(*PRUNE)b/s
+ aab
+ 0: ab
+
+/^a(*PRUNE)b/s
+\= Expect no match
+ aab
+No match
+
+/.*?a(*SKIP)b/
+ aab
+ 0: ab
+
+/(?(8000000000/
+Failed: error 161 at offset 8: group number is too big
+
+/((?(R8000000000)))/
+Failed: error 161 at offset 9: group number is too big
+
+/0(?0)|(1)(*THEN)(*SKIP:0)(*FAIL)/
+\= Expect no match
+ 01
+No match
+
+/(?(1)()\983040\2)/
+Failed: error 161 at offset 14: group number is too big
+
+/(*LIMIT_MATCH=)abc/
+Failed: error 160 at offset 14: (*VERB) not recognized or malformed
+
+/(*CRLF)(*LIMIT_MATCH=)abc/
+Failed: error 160 at offset 21: (*VERB) not recognized or malformed
+
+/(?:ab)?(?:ab)(?:ab)/
+ abab
+ 0: abab
+ ababab
+ 0: ababab
+\= Expect no match
+ aba
+No match
+
+/((*MARK:A))++a(*SKIP:B)b/
+\= Expect no match
+ aacb
+No match
+
+/(*MARK:a\zb)z/alt_verbnames
+Failed: error 140 at offset 10: invalid escape sequence in (*VERB) name
+
+/(*:ab\t(d\)c)xxx/
+Failed: error 122 at offset 12: unmatched closing parenthesis
+
+/(*:ab\t(d\)c)xxx/alt_verbnames,mark
+ cxxxz
+ 0: xxx
+MK: ab\x09(d)c
+
+/(*:A\Qxx)x\EB)x/alt_verbnames,mark
+ x
+ 0: x
+MK: Axx)xB
+
+/(*:A\ExxxB)x/alt_verbnames,mark
+ x
+ 0: x
+MK: AxxxB
+
+/(*: A \ and #comment
+ \ B)x/x,alt_verbnames,mark
+ x
+ 0: x
+MK: A and B
+
+/(*: A \ and #comment
+ \ B)x/alt_verbnames,mark
+ x
+ 0: x
+MK: A and #comment\x0a B
+
+/(*: A \ and #comment
+ \ B)x/x,mark
+ x
+ 0: x
+MK: A \ and #comment\x0a \ B
+
+/(*: A \ and #comment
+ \ B)x/mark
+ x
+ 0: x
+MK: A \ and #comment\x0a \ B
+
+/(*:A
+B)x/alt_verbnames,mark
+ x
+ 0: x
+MK: A\x0aB
+
+/(*:abc\Qpqr)/alt_verbnames
+Failed: error 160 at offset 12: (*VERB) not recognized or malformed
+
+/abc/use_offset_limit
+ 1234abcde\=offset_limit=100
+ 0: abc
+ 1234abcde\=offset_limit=9
+ 0: abc
+ 1234abcde\=offset_limit=4
+ 0: abc
+ 1234abcde\=offset_limit=4,offset=4
+ 0: abc
+\= Expect no match
+ 1234abcde\=offset_limit=4,offset=5
+No match
+ 1234abcde\=offset_limit=3
+No match
+
+/(?<=abc)/use_offset_limit
+ 1234abc\=offset_limit=7
+ 0:
+\= Expect no match
+ 1234abc\=offset_limit=6
+No match
+
+/A/g,replace=-,use_offset_limit
+ XAXAXAXAXA\=offset_limit=4
+ 2: X-X-XAXAXA
+
+/abc/
+\= Expect error
+ 1234abcde\=offset_limit=4
+Failed: error -56: offset limit set without PCRE2_USE_OFFSET_LIMIT
+
+/^\w/m,use_offset_limit
+ \n..\naa\=offset_limit=3
+No match
+ \n..\naa\=offset_limit=4
+ 0: a
+
+/abcd/null_context
+ abcd\=null_context
+ 0: abcd
+\= Expect error
+ abcd\=null_context,find_limits
+** Not allowed together: find_limits null_context
+ abcd\=allusedtext,startchar
+** Not allowed together: allusedtext startchar
+
+/abcd/replace=w\rx\x82y\o{333}z(\Q12\$34$$\x34\E5$$),substitute_extended
+ abcd
+ 1: w\x0dx\x82y\xdbz(12\$34$$\x345$)
+
+/a(bc)(DE)/replace=a\u$1\U$1\E$1\l$2\L$2\Eab\Uab\LYZ\EDone,substitute_extended
+ abcDE
+ 1: aBcBCbcdEdeabAByzDone
+
+/abcd/replace=xy\kz,substitute_extended
+ abcd
+Failed: error -57 at offset 4 in replacement: bad escape sequence in replacement string
+
+/a(?:(b)|(c))/substitute_extended,replace=X${1:+1:-1}X${2:+2:-2}
+ ab
+ 1: X1X-2
+ ac
+ 1: X-1X2
+ ab\=replace=${1:+$1\:$1:$2}
+ 1: b:b
+ ac\=replace=${1:+$1\:$1:$2}
+ 1: c
+
+/a(?:(b)|(c))/substitute_extended,replace=X${1:-1:-1}X${2:-2:-2}
+ ab
+ 1: XbX2:-2
+ ac
+ 1: X1:-1Xc
+
+/(a)/substitute_extended,replace=>${1:+\Q$1:{}$$\E+\U$1}<
+ a
+ 1: >$1:{}$$+A<
+
+/X(b)Y/substitute_extended
+ XbY\=replace=x${1:+$1\U$1}y
+ 1: xbBY
+ XbY\=replace=\Ux${1:+$1$1}y
+ 1: XBBY
+
+/a/substitute_extended,replace=${*MARK:+a:b}
+ a
+Failed: error -58 at offset 7 in replacement: expected closing curly bracket in replacement string
+
+/(abcd)/replace=${1:+xy\kz},substitute_extended
+ abcd
+Failed: error -57 at offset 8 in replacement: bad escape sequence in replacement string
+
+/(abcd)/
+ abcd\=replace=${1:+xy\kz},substitute_extended
+Failed: error -57 at offset 8 in replacement: bad escape sequence in replacement string
+
+/abcd/substitute_extended,replace=>$1<
+ abcd
+Failed: error -49 at offset 3 in replacement: unknown substring
+
+/abcd/substitute_extended,replace=>xxx${xyz}<<<
+ abcd
+Failed: error -49 at offset 10 in replacement: unknown substring
+
+/(?J)(?:(?<A>a)|(?<A>b))/replace=<$A>
+ [a]
+ 1: [<a>]
+ [b]
+ 1: [<b>]
+\= Expect error
+ (a)\=ovector=1
+Failed: error -54 at offset 3 in replacement: requested value is not available
+
+/(a)|(b)/replace=<$1>
+\= Expect error
+ b
+Failed: error -55 at offset 3 in replacement: requested value is not set
+
+/(aa)(BB)/substitute_extended,replace=\U$1\L$2\E$1..\U$1\l$2$1
+ aaBB
+ 1: AAbbaa..AAbBaa
+
+/^(o(\1{72}{\"{\\{00000059079}\d*){74}}){19}/I
+Capturing subpattern count = 2
+Max back reference = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'o'
+Last code unit = '}'
+Subject length lower bound = 65535
+
+/((p(?'K/
+Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator)
+
+/((p(?'K/no_auto_capture
+Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator)
+
+/abc/replace=A$3123456789Z
+ abc
+Failed: error -49 at offset 3 in replacement: unknown substring
+
+/(?<!a{65535}a{5})x/I
+Failed: error 187 at offset 0: lookbehind assertion is too long
+
+/(?<!a{65535})x/I
+Capturing subpattern count = 0
+Max lookbehind = 65535
+First code unit = 'x'
+Subject length lower bound = 1
+
+/(?=a\K)/replace=z
+ BaCaD
+Failed: error -60: match with end before start or start moved backwards is not supported
+
+/(?<=\K.)/g,replace=-
+ ab
+Failed: error -60: match with end before start or start moved backwards is not supported
+
+/(?'abcdefghijklmnopqrstuvwxyzABCDEFG'toolong)/
+Failed: error 148 at offset 36: subpattern name is too long (maximum 32 characters)
+
+/(?'abcdefghijklmnopqrstuvwxyzABCDEF'justright)/
+
+# These two use zero-termination
+/abcd/max_pattern_length=3
+Failed: error 188 at offset 0: pattern string is longer than the limit set by the application
+
+/abc/max_pattern_length=3
+
+# These two, being hex, pass the length
+/abcdefab/hex,max_pattern_length=3
+Failed: error 188 at offset 0: pattern string is longer than the limit set by the application
+
+/abcdef/hex,max_pattern_length=3
+
+# These patterns used to take a long time to compile
+
+"(.*)
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))"xI
+Capturing subpattern count = 12
+May match empty string
+Options: extended
+First code unit at start or follows newline
+Subject length lower bound = 0
+
+"(?<=a()
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+a)"xI
+Capturing subpattern count = 12
+Max lookbehind = 2
+May match empty string
+Options: extended
+Subject length lower bound = 0
+
+"(?|()|())(.*)
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))"xI
+Capturing subpattern count = 13
+May match empty string
+Options: extended
+Subject length lower bound = 0
+
+"(?|()|())(?<=a()
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
+a)"xI
+Failed: error 135 at offset 9: lookbehind is too complicated
+
+# Test the use of malloc for caching group information when there are more
+# groups than fit into the on-stack workspace.
+
+/\[()]{1024}/I,expand
+Expanded: ()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()
+Capturing subpattern count = 1024
+May match empty string
+Subject length lower bound = 0
+
+# Test minlength capped at 65535
+
+/(A{65000})\1{65000}/I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'A'
+Last code unit = 'A'
+Subject length lower bound = 65535
+
+# Test group scans when numbers are not unique
+
+/(?|()+|(a)+)/BI
+------------------------------------------------------------------
+ Bra
+ Bra
+ SCBra 1
+ KetRmax
+ Alt
+ CBra 1
+ a
+ KetRmax
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+
+/(?|(a)+|()+)/BI
+------------------------------------------------------------------
+ Bra
+ Bra
+ CBra 1
+ a
+ KetRmax
+ Alt
+ SCBra 1
+ KetRmax
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+
+/(?|()|(a))/BI
+------------------------------------------------------------------
+ Bra
+ Bra
+ CBra 1
+ Ket
+ Alt
+ CBra 1
+ a
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+
+/(?|(a)|())/BI
+------------------------------------------------------------------
+ Bra
+ Bra
+ CBra 1
+ a
+ Ket
+ Alt
+ CBra 1
+ Ket
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+May match empty string
+Subject length lower bound = 0
+
+# Test CRLF handling in empty string substitutions
+
+/^$/gm,newline=anycrlf,replace=-
+ X\r\n\r\nY
+ 1: X\x0d\x0a-\x0d\x0aY
+
+/^$/gm,newline=crlf,replace=-
+ X\r\n\r\nY
+ 1: X\x0d\x0a-\x0d\x0aY
+
+/^$/gm,newline=any,replace=-
+ X\r\n\r\nY
+ 1: X\x0d\x0a-\x0d\x0aY
+
+"(*ANYCRLF)(?m)^(.*[^0-9\r\n].*|)$"g,replace=NaN
+ 15\r\nfoo\r\n20\r\nbar\r\nbaz\r\n\r\n20
+ 4: 15\x0d\x0aNaN\x0d\x0a20\x0d\x0aNaN\x0d\x0aNaN\x0d\x0aNaN\x0d\x0a20
+
+/a[[:punct:]b]/bincode
+------------------------------------------------------------------
+ Bra
+ a
+ [!-/:-@[-`b{-~]
+ Ket
+ End
+------------------------------------------------------------------
+
+/a[b[:punct:]]/bincode
+------------------------------------------------------------------
+ Bra
+ a
+ [!-/:-@[-`b{-~]
+ Ket
+ End
+------------------------------------------------------------------
+
+/L(?#(|++<!(2)?/B
+------------------------------------------------------------------
+ Bra
+ L?+
+ Ket
+ End
+------------------------------------------------------------------
+
+/L(?#(|++<!(2)?/B,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ L?
+ Ket
+ End
+------------------------------------------------------------------
+
+/L(?#(|++<!(2)?/B,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 14
+ L?+
+ Callout 255 14 0
+ Ket
+ End
+------------------------------------------------------------------
+
+/L(?#(|++<!(2)?/B,no_auto_possess,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 14
+ L?
+ Callout 255 14 0
+ Ket
+ End
+------------------------------------------------------------------
+
+/(A*)\E+/B,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ SCBra 1
+ Callout 255 1 2
+ A*
+ Callout 255 3 4
+ KetRmax
+ Callout 255 7 0
+ Ket
+ End
+------------------------------------------------------------------
+
+/()\Q\E*]/B,auto_callout
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 1
+ Brazero
+ SCBra 1
+ Callout 255 1 6
+ KetRmax
+ Callout 255 7 1
+ ]
+ Callout 255 8 0
+ Ket
+ End
+------------------------------------------------------------------
+ a[bc]d
+--->a[bc]d
+ +0 ^ (
+ +1 ^ )\Q\E*
+ +7 ^ ]
+ +8 ^^ End of pattern
+ 0: ]
+ 1:
+
+/\x8a+f|;T?(*:;.'?`(\xeap ){![^()!y*''C*(?';]{1;(\x08)/B,alt_verbnames,dupnames,extended
+------------------------------------------------------------------
+ Bra
+ \x{8a}++
+ f
+ Alt
+ ;
+ T?
+ *MARK ;.'?`(\x{ea}p
+ {!
+ [\x00- "-&+-:<->@-BD-xz-\xff] (neg)
+ {1;
+ CBra 1
+ \x08
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+# Tests for NULL characters in comments and verb "names" and callouts
+
+# /A#B\x00C\x0aZ/
+/41 23 42 00 43 0a 5a/Bx,hex
+------------------------------------------------------------------
+ Bra
+ AZ
+ Ket
+ End
+------------------------------------------------------------------
+
+# /A+#B\x00C\x0a+/
+/41 2b 23 42 00 43 0a 2b/Bx,hex
+------------------------------------------------------------------
+ Bra
+ A++
+ Ket
+ End
+------------------------------------------------------------------
+
+# /A(*:B\x00W#X\00Y\x0aC)Z/
+/41 28 2a 3a 42 00 57 23 58 00 59 0a 43 29 5a/Bx,hex,alt_verbnames
+------------------------------------------------------------------
+ Bra
+ A
+ *MARK B\x{0}WC
+ Z
+ Ket
+ End
+------------------------------------------------------------------
+
+# /A(*:B\x00W#X\00Y\x0aC)Z/
+/41 28 2a 3a 42 00 57 23 58 00 59 0a 43 29 5a/Bx,hex
+------------------------------------------------------------------
+ Bra
+ A
+ *MARK B\x{0}W#X\x{0}Y\x{a}C
+ Z
+ Ket
+ End
+------------------------------------------------------------------
+
+# /A(?C{X\x00Y})B/
+/41 28 3f 43 7b 58 00 59 7d 29 42/B,hex
+------------------------------------------------------------------
+ Bra
+ A
+ CalloutStr {X\x{0}Y} 5 10 1
+ B
+ Ket
+ End
+------------------------------------------------------------------
+
+# /A(?#X\x00Y)B/
+/41 28 3f 23 7b 00 7d 29 42/B,hex
+------------------------------------------------------------------
+ Bra
+ AB
+ Ket
+ End
+------------------------------------------------------------------
+
+# Tests for leading comment in extended patterns
+
+/ (?-x):?/extended
+
+/\v(?-x):?/extended
+
+/0b 28 3f 2d 78 29 3a/hex,extended
+
+/#comment
+(?-x):?/extended
+
+/(8(*:6^\x09x\xa6l\)6!|\xd0:[^:|)\x09d\Z\d{85*m(?'(?<1!)*\W[*\xff]!!h\w]*\xbe;/alt_bsux,alt_verbnames,allow_empty_class,dollar_endonly,extended,multiline,never_utf,no_dotstar_anchor,no_start_optimize
+Failed: error 162 at offset 49: subpattern name expected
+
+/a|(b)c/replace=>$1<,substitute_unset_empty
+ cat
+ 1: c><t
+ xbcom
+ 1: x>b<om
+
+/a|(b)c/
+ cat\=replace=>$1<
+Failed: error -55 at offset 3 in replacement: requested value is not set
+ cat\=replace=>$1<,substitute_unset_empty
+ 1: c><t
+ xbcom\=replace=>$1<,substitute_unset_empty
+ 1: x>b<om
+
+/a|(b)c/substitute_extended
+ cat\=replace=>${2:-xx}<
+Failed: error -49 at offset 9 in replacement: unknown substring
+ cat\=replace=>${2:-xx}<,substitute_unknown_unset
+ 1: c>xx<t
+ cat\=replace=>${X:-xx}<,substitute_unknown_unset
+ 1: c>xx<t
+
+/a|(?'X'b)c/replace=>$X<,substitute_unset_empty
+ cat
+ 1: c><t
+ xbcom
+ 1: x>b<om
+
+/a|(?'X'b)c/replace=>$Y<,substitute_unset_empty
+ cat
+Failed: error -49 at offset 3 in replacement: unknown substring
+ cat\=substitute_unknown_unset
+ 1: c><t
+ cat\=substitute_unknown_unset,-substitute_unset_empty
+Failed: error -55 at offset 3 in replacement: requested value is not set
+
+/a|(b)c/replace=>$2<,substitute_unset_empty
+ cat
+Failed: error -49 at offset 3 in replacement: unknown substring
+ cat\=substitute_unknown_unset
+ 1: c><t
+ cat\=substitute_unknown_unset,-substitute_unset_empty
+Failed: error -55 at offset 3 in replacement: requested value is not set
+
+/()()()/use_offset_limit
+ \=ovector=11000000000
+** Invalid value in 'ovector=11000000000'
+ \=callout_fail=11000000000
+** Invalid value in 'callout_fail=11000000000'
+ \=callout_fail=1:11000000000
+** Invalid value in 'callout_fail=1:11000000000'
+ \=callout_data=11000000000
+** Invalid value in 'callout_data=11000000000'
+ \=callout_data=-11000000000
+** Invalid value in 'callout_data=-11000000000'
+ \=offset_limit=1100000000000000000000
+** Invalid value in 'offset_limit=1100000000000000000000'
+ \=copy=11000000000
+** Invalid value in 'copy=11000000000'
+
+/(*MARK:A\x00b)/mark
+ abc
+ 0:
+MK: A\x00b
+
+/(*MARK:A\x00b)/mark,alt_verbnames
+ abc
+ 0:
+MK: A\x00b
+
+/"(*MARK:A" 00 "b)"/mark,hex
+ abc
+ 0:
+MK: A\x00b
+
+/"(*MARK:A" 00 "b)"/mark,hex,alt_verbnames
+ abc
+ 0:
+MK: A\x00b
+
+/efg/hex
+** Unexpected non-hex-digit 'g' at offset 2 in hex pattern: quote missing?
+
+/eff/hex
+** Odd number of digits in hex pattern
+
+/effg/hex
+** Unexpected non-hex-digit 'g' at offset 3 in hex pattern: quote missing?
+
+/(?J)(?'a'))(?'a')/
+Failed: error 122 at offset 10: unmatched closing parenthesis
+
+/(?<=((?C)0))/
+ 9010
+--->9010
+ 0 ^ 0
+ 0 ^ 0
+ 0:
+ 1: 0
+\= Expect no match
+ abc
+--->abc
+ 0 ^ 0
+ 0 ^ 0
+ 0 ^ 0
+No match
+
+/aaa/
+\[abc]{10000000000000000000000000000}
+** Repeat count too large
+\[a]{3}
+ 0: aaa
+
+/\[AB]{6000000000000000000000}/expand
+** Pattern repeat count too large
+
+# Hex uses pattern length, not zero-terminated. This tests for overrunning
+# the given length of a pattern.
+
+/'(*U'/hex
+Failed: error 160 at offset 3: (*VERB) not recognized or malformed
+
+/'(*'/hex
+Failed: error 109 at offset 1: quantifier does not follow a repeatable item
+
+/'('/hex
+Failed: error 114 at offset 1: missing closing parenthesis
+
+//hex
+
+# These tests are here because Perl never allows a back reference in a
+# lookbehind. PCRE2 supports some limited cases.
+
+/([ab])...(?<=\1)z/
+ a11az
+ 0: a11az
+ 1: a
+ b11bz
+ 0: b11bz
+ 1: b
+\= Expect no match
+ b11az
+No match
+
+/(?|([ab]))...(?<=\1)z/
+Failed: error 125 at offset 13: lookbehind assertion is not fixed length
+
+/([ab])(\1)...(?<=\2)z/
+ aa11az
+ 0: aa11az
+ 1: a
+ 2: a
+
+/(a\2)(b\1)(?<=\2)/
+Failed: error 125 at offset 10: lookbehind assertion is not fixed length
+
+/(?<A>[ab])...(?<=\k'A')z/
+ a11az
+ 0: a11az
+ 1: a
+ b11bz
+ 0: b11bz
+ 1: b
+\= Expect no match
+ b11az
+No match
+
+/(?<A>[ab])...(?<=\k'A')(?<A>)z/dupnames
+Failed: error 125 at offset 13: lookbehind assertion is not fixed length
+
+# Perl does not support \g+n
+
+/((\g+1X)?([ab]))+/
+ aaXbbXa
+ 0: aaXbbXa
+ 1: bXa
+ 2: bX
+ 3: a
+
+/ab(?C1)c/auto_callout
+ abc
+--->abc
+ +0 ^ a
+ +1 ^^ b
+ 1 ^ ^ c
+ +8 ^ ^ End of pattern
+ 0: abc
+
+/'ab(?C1)c'/hex,auto_callout
+ abc
+--->abc
+ +0 ^ a
+ +1 ^^ b
+ 1 ^ ^ c
+ +8 ^ ^ End of pattern
+ 0: abc
+
+# Perl accepts these, but gives a warning. We can't warn, so give an error.
+
+/[a-[:digit:]]+/
+Failed: error 150 at offset 4: invalid range in character class
+ a-a9-a
+
+/[A-[:digit:]]+/
+Failed: error 150 at offset 4: invalid range in character class
+ A-A9-A
+
+/[a-\d]+/
+Failed: error 150 at offset 5: invalid range in character class
+ a-a9-a
+
+/(?<RA>abc)(?(R)xyz)/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ abc
+ Ket
+ Cond
+ Cond recurse any
+ xyz
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?<R>abc)(?(R)xyz)/B
+------------------------------------------------------------------
+ Bra
+ CBra 1
+ abc
+ Ket
+ Cond
+ 1 Cond ref
+ xyz
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=.*[A-Z])/I
+Capturing subpattern count = 0
+May match empty string
+Subject length lower bound = 0
+
+/()(?<=(?0))/
+Failed: error 125 at offset 2: lookbehind assertion is not fixed length
+
+/(?<!|!(?<!))/
+
+/(?<!|!|!||||||(?<!)||(?<!)!|!||(?<!)!|!(?<!)!|!|!|!||||!!|<!)!|!||||!|/
+
+/{2,2{2,2/use_length
+
+/.>*?\g'0/use_length
+Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/.>*?\g'0/
+Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/{\84Í\84ÍÍ\84Í{'{22{2{{2{'{22{\12{22{2{'{22{2{{2{{222{{2{'{22{2{22{2{'{22{2{{2{'{22{2{22{2{'{'{22{2{22{2{'{22{2{{2{'{22{2{22{2{'{222{2Ä\84Í\84ÍÍ\84Í{'{22{2{{2{'{22{\12{11{2{'{22{2{{2{{'{22{2{{2{'{22{\12{22{1{'{22{2{{2{{222{{2{'{22{2{22{2{'{/auto_callout
+
+//
+\=get=i00000000000000000000000000000000
+** Group name in 'get' is too long
+\=get=i2345678901234567890123456789012,get=i1245678901234567890123456789012
+** Too many characters in named 'get' modifiers
+
+"(?(?C))"
+Failed: error 128 at offset 6: assertion expected after (?( or (?(?C)
+
+/(?(?(?(?(?(?))))))/
+Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
+
+/(?<=(?1))((?s))/anchored
+
+/(*:ab)*/
+Failed: error 109 at offset 6: quantifier does not follow a repeatable item
+
+%(*:\1e(:\11(\1fsvvvvvvvvvv:]*[ Z!*;[]*[^[]*!^[\19+.+{{2,7}' _\\\\\\\\\\\\\)?.:.. *w////\\\Q\\\\\\\\\\\\\\\T\\\\\+/?/////'+\\\EEE?/////'+/*+/[^K]?]//(w)%never_backslash_c,alt_verbnames,auto_callout
+
+/./newline=crlf
+ \=ph
+No match
+
+/(\x0e00\000000\xc)/replace=\P,substitute_extended
+ \x0e00\000000\xc
+Failed: error -57 at offset 2 in replacement: bad escape sequence in replacement string
+
+//replace=0
+ \=offset=7
+Failed: error -33: bad offset value
+
+/(?<=\G.)/g,replace=+
+ abc
+ 3: a+b+c+
+
+".+\QX\E+"B,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ Any+
+ X+
+ Ket
+ End
+------------------------------------------------------------------
+
+".+\QX\E+"B,auto_callout,no_auto_possess
+------------------------------------------------------------------
+ Bra
+ Callout 255 0 4
+ Any+
+ Callout 255 4 4
+ X+
+ Callout 255 8 0
+ Ket
+ End
+------------------------------------------------------------------
+
+# This one is here because Perl gives an 'unmatched )' error which goes away
+# if one of the \) sequences is removed - which is weird. PCRE finds it too
+# complicated to find a minimum matching length.
+
+"()X|((((((((()))))))((((())))))\2())((((((\2\2)))\2)(\22((((\2\2)2))\2)))(2\ZZZ)+:)Z^|91ZiZZnter(ZZ |91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z+:)Z|91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z((Z*(\2(Z\':))\0)i|||||||||||||||loZ\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \)\0nte!rnal errpr\2\\21r(2\ZZZ)+:)Z!|91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \)\0(2\ZZZ)+:)Z^|91ZiZZnter(ZZ |91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \)\0(2\ZZZ)+:)Z^)))int \)\0(2\ZZZ)+:)Z^|91ZiZZnter(ZZernZal ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \))\ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)))\2))))((((((\2\2))))))"I
+Capturing subpattern count = 108
+Max back reference = 22
+Contains explicit CR or LF match
+Subject length lower bound = 1
+
+# This checks that new code for handling groups that may match an empty string
+# works on a very large number of alternatives. This pattern used to provoke a
+# complaint that it was too complicated.
+
+/(?:\[A|B|C|D|E|F|G|H|I|J|]{200}Z)/expand
+
+# This one used to compile rubbish instead of a compile error, and then
+# behave unpredictably at match time.
+
+/.+(?(?C'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'))?!XXXX.=X/
+Failed: error 128 at offset 63: assertion expected after (?( or (?(?C)
+ .+(?(?C'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'))?!XXXX.=X
+
+/[:[:alnum:]-[[a:lnum:]+/
+Failed: error 150 at offset 11: invalid range in character class
+
+/((?(?C'')\QX\E(?!((?(?C'')(?!X=X));=)r*X=X));=)/
+Failed: error 128 at offset 11: assertion expected after (?( or (?(?C)
+
+/((?(?C'')\Q\E(?!((?(?C'')(?!X=X));=)r*X=X));=)/
+
+/abcd/auto_callout
+ abcd\=callout_error=255:2
+--->abcd
+ +0 ^ a
+ +1 ^^ b
+Failed: error -37: callout error code
+
+/()(\g+65534)/
+Failed: error 161 at offset 11: group number is too big
+
+/()(\g+65533)/
+Failed: error 115 at offset 10: reference to non-existent subpattern
+
+/Á\x00\x00\x00\17\9a(\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\x00k\d+\x00â\80\8e\x00\x00\x00\x00\x00\2*\x00\x00\1*.){36}int^\x00\x00\bÿÿ\x00\9a(\1{50779}?)J\w2/I
+Capturing subpattern count = 2
+Max back reference = 2
+First code unit = \xc1
+Last code unit = '2'
+Subject length lower bound = 65535
+
+/(a)(b)\2\1\1\1\1/I
+Capturing subpattern count = 2
+Max back reference = 2
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 7
+
+/(?<a>a)(?<b>b)\g{b}\g{a}\g{a}\g{a}\g{a}(?<a>xx)(?<b>zz)/I,dupnames
+Capturing subpattern count = 4
+Max back reference = 4
+Named capturing subpatterns:
+ a 1
+ a 3
+ b 2
+ b 4
+Options: dupnames
+First code unit = 'a'
+Last code unit = 'z'
+Subject length lower bound = 11
+
+//
+ \=ovector=7777777777
+** Invalid value in 'ovector=7777777777'
+
+# This is here because Perl matches, even though a COMMIT is encountered
+# outside of the recursion.
+
+/(?1)(A(*COMMIT)|B)D/
+ BAXBAD
+No match
+
+"(?1){2}(a)"B
+------------------------------------------------------------------
+ Bra
+ Recurse
+ Recurse
+ CBra 1
+ a
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+"(?1){2,4}(a)"B
+------------------------------------------------------------------
+ Bra
+ Recurse
+ Recurse
+ Brazero
+ Bra
+ Bra
+ Recurse
+ Ket
+ Brazero
+ Bra
+ Recurse
+ Ket
+ Ket
+ CBra 1
+ a
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+# This test differs from Perl for the first subject. Perl ends up with
+# $1 set to 'B'; PCRE2 has it unset (which I think is right).
+
+/^(?:
+(?:A| (?:B|B(*ACCEPT)) (?<=(.)) D)
+(Z)
+)+$/x
+ AZB
+ 0: AZB
+ 1: <unset>
+ 2: Z
+ AZBDZ
+ 0: AZBDZ
+ 1: B
+ 2: Z
+
+# The first of these, when run by Perl, gives the mark 'aa', which is wrong.
+
+'(?>a(*:aa))b|ac' mark
+ ac
+ 0: ac
+
+'(?:a(*:aa))b|ac' mark
+ ac
+ 0: ac
+
+/(R?){65}/
+ (R?){65}
+ 0:
+ 1:
+
+/\[(a)]{60}/expand
+ aaaa
+No match
+
+/(?<!\1((?U)1((?U))))(*F)/never_backslash_c,alt_bsux,anchored,extended
+
+/\g{3/
+Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
+
+/(a(?C1)(b)(c)d)+/
+ abcdabcd\=callout_capture
+Callout 1: last capture = 0
+--->abcdabcd
+ ^^ (
+Callout 1: last capture = 1
+ 1: abcd
+ 2: b
+ 3: c
+--->abcdabcd
+ ^ ^ (
+ 0: abcdabcd
+ 1: abcd
+ 2: b
+ 3: c
+
+# Perl matches this one, but PCRE does not because (*ACCEPT) clears out any
+# pending backtracks in the recursion.
+
+/^ (?(DEFINE) (..(*ACCEPT)|...) ) (?1)$/x
+\= Expect no match
+ abc
+No match
+
+# Perl gives no match for this one
+
+/(a(*MARK:m)(*ACCEPT)){0}(?1)/mark
+ abc
+ 0: a
+MK: m
+
+/abc/endanchored
+ xyzabc
+ 0: abc
+\= Expect no match
+ xyzabcdef
+No match
+\= Expect error
+ xyzabc\=ph
+Failed: error -34: bad option value
+
+/abc/
+ xyzabc\=endanchored
+ 0: abc
+\= Expect no match
+ xyzabcdef\=endanchored
+No match
+\= Expect error
+ xyzabc\=ps,endanchored
+Failed: error -34: bad option value
+
+/abc(*ACCEPT)d/endanchored
+ xyzabc
+ 0: abc
+\= Expect no match
+ xyzabcdef
+No match
+
+/abc|bcd/endanchored
+ xyzabcd
+ 0: bcd
+\= Expect no match
+ xyzabcdef
+No match
+
+/a(*ACCEPT)x|aa/endanchored
+ aaa
+ 0: a
+
+# Check auto-anchoring when there is a group that is never obeyed at
+# the start of a branch.
+
+/(?(DEFINE)(a))^bc/I
+Capturing subpattern count = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'b'
+Subject length lower bound = 2
+
+/(a){0}.*bc/sI
+Capturing subpattern count = 1
+Compile options: dotall
+Overall options: anchored dotall
+Last code unit = 'c'
+Subject length lower bound = 2
+
+# This should be anchored, as the condition is always false and there is
+# no alternative branch.
+
+/(?(VERSION>=999)yes)^bc/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 2
+
+# This should not be anchored.
+
+/(?(VERSION>=999)yes|no)^bc/I
+Capturing subpattern count = 0
+Last code unit = 'c'
+Subject length lower bound = 4
+
+/(*LIMIT_HEAP=0)xxx/I
+Capturing subpattern count = 0
+Heap limit = 0
+First code unit = 'x'
+Last code unit = 'x'
+Subject length lower bound = 3
+
+/\d{0,3}(*:abc)(?C1)xxx/callout_info
+Callout 1 x
+
+# ----------------------------------------------------------------------
+
+# These are a whole pile of tests that touch lines of code that are not
+# used by any other tests (at least when these were created).
+
+/^a+?x/i,no_start_optimize,no_auto_possess
+\= Expect no match
+ aaa
+No match
+
+/^[^a]{3,}?x/i,no_start_optimize,no_auto_possess
+\= Expect no match
+ bbb
+No match
+ cc
+No match
+
+/^X\S/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\W/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\H/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\h/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\V/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\v/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\h/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY
+No match
+
+/^X\V/no_start_optimize,no_auto_possess
+\= Expect no match
+ X\n
+No match
+
+/^X\v/no_start_optimize,no_auto_possess
+\= Expect no match
+ XX
+No match
+
+/^X.+?/s,no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\R+?/no_start_optimize,no_auto_possess
+\= Expect no match
+ XX
+No match
+
+/^X\H+?/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\h+?/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+
+/^X\V+?/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+ X\n
+No match
+
+/^X\D+?/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+ X9
+No match
+
+/^X\S+?/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+ X\n
+No match
+
+/^X\W+?/no_start_optimize,no_auto_possess
+\= Expect no match
+ X
+No match
+ XX
+No match
+
+/^X.+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY\n
+No match
+
+/(*CRLF)^X.+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY\r\=ps
+Partial match: XY\x0d
+
+/^X\R+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X\nX
+No match
+ X\n\r\n
+No match
+ X\n\rY
+No match
+ X\n\nY
+No match
+ X\n\x{0c}Y
+No match
+
+/(*BSR_ANYCRLF)^X\R+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X\nX
+No match
+ X\n\r\n
+No match
+ X\n\rY
+No match
+ X\n\nY
+No match
+ X\n\x{0c}Y
+No match
+
+/^X\H+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY\t
+No match
+ XYY
+No match
+
+/^X\h+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X\t\t
+No match
+ X\tY
+No match
+
+/^X\V+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY\n
+No match
+ XYY
+No match
+
+/^X\v+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X\n\n
+No match
+ X\nY
+No match
+
+/^X\D+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY9
+No match
+ XYY
+No match
+
+/^X\d+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X99
+No match
+ X9Y
+No match
+
+/^X\S+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY\n
+No match
+ XYY
+No match
+
+/^X\s+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X\n\n
+No match
+ X\nY
+No match
+
+/^X\W+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X.A
+No match
+ X++
+No match
+
+/^X\w+?Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ Xa.
+No match
+ Xaa
+No match
+
+/^X.{1,3}Z/s,no_start_optimize,no_auto_possess
+\= Expect no match
+ Xa.bd
+No match
+
+/^X\h+Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ X\t\t
+No match
+ X\tY
+No match
+
+/^X\V+Z/no_start_optimize,no_auto_possess
+\= Expect no match
+ XY\n
+No match
+ XYY
+No match
+
+/^(X(*THEN)Y|AB){0}(?1)/
+ ABX
+ 0: AB
+\= Expect no match
+ XAB
+No match
+
+/^(?!A(?C1)B)C/
+ ABC\=callout_error=1,no_jit
+No match
+
+/^(?!A(?C1)B)C/no_start_optimize
+ ABC\=callout_error=1
+--->ABC
+ 1 ^^ B
+Failed: error -37: callout error code
+
+/^(?(?!A(?C1)B)C)/
+ ABC\=callout_error=1
+--->ABC
+ 1 ^^ B
+Failed: error -37: callout error code
+
+# ----------------------------------------------------------------------
+
+/[a b c]/BxxI
+------------------------------------------------------------------
+ Bra
+ [a-c]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: extended_more
+Starting code units: a b c
+Subject length lower bound = 1
+
+/[a b c]/BxxxI
+------------------------------------------------------------------
+ Bra
+ [a-c]
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: extended extended_more
+Starting code units: a b c
+Subject length lower bound = 1
+
+/[a b c]/B,extended_more
+------------------------------------------------------------------
+ Bra
+ [a-c]
+ Ket
+ End
+------------------------------------------------------------------
+
+/[ a b c ]/B,extended_more
+------------------------------------------------------------------
+ Bra
+ [a-c]
+ Ket
+ End
+------------------------------------------------------------------
+
+/[a b](?xx: [ 12 ] (?-xx:[ 34 ]) )y z/B
+------------------------------------------------------------------
+ Bra
+ [ ab]
+ Bra
+ [12]
+ Bra
+ [ 34]
+ Ket
+ Ket
+ y z
+ Ket
+ End
+------------------------------------------------------------------
+
+# Unsetting /x also unsets /xx
+
+/[a b](?xx: [ 12 ] (?-x:[ 34 ]) )y z/B
+------------------------------------------------------------------
+ Bra
+ [ ab]
+ Bra
+ [12]
+ Bra
+ [ 34]
+ Ket
+ Ket
+ y z
+ Ket
+ End
+------------------------------------------------------------------
+
+/(a)(?-n:(b))(c)/nB
+------------------------------------------------------------------
+ Bra
+ Bra
+ a
+ Ket
+ Bra
+ CBra 1
+ b
+ Ket
+ Ket
+ Bra
+ c
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+# ----------------------------------------------------------------------
+# These test the dangerous PCRE2_EXTRA_BAD_ESCAPE_IS_LITERAL option.
+
+/\j\x{z}\o{82}\L\uabcd\u\U\g{\g/B,\bad_escape_is_literal
+** Unrecognized modifier '\' in '\bad_escape_is_literal'
+
+/\N{\c/IB,bad_escape_is_literal
+------------------------------------------------------------------
+ Bra
+ N{c
+ Ket
+ End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Extra options: bad_escape_is_literal
+First code unit = 'N'
+Last code unit = 'c'
+Subject length lower bound = 3
+
+/[\j\x{z}\o\gA-\Nb-\g]/B,bad_escape_is_literal
+------------------------------------------------------------------
+ Bra
+ [A-Nb-gjoxz{}]
+ Ket
+ End
+------------------------------------------------------------------
+
+/[Q-\N]/B,bad_escape_is_literal
+Failed: error 108 at offset 4: range out of order in character class
+
+# ----------------------------------------------------------------------
+
+/a\b(c/literal
+ a\\b(c
+ 0: a\b(c
+
+/a\b(c/literal,caseless
+ a\\b(c
+ 0: a\b(c
+ a\\B(c
+ 0: a\B(c
+
+/a\b(c/literal,firstline
+ XYYa\\b(c
+ 0: a\b(c
+\= Expect no match
+ X\na\\b(c
+No match
+
+/a\b?c/literal,use_offset_limit
+ XXXXa\\b?c\=offset_limit=4
+ 0: a\b?c
+\= Expect no match
+ XXXXa\\b?c\=offset_limit=3
+No match
+
+/a\b(c/literal,anchored,endanchored
+ a\\b(c
+ 0: a\b(c
+\= Expect no match
+ Xa\\b(c
+No match
+ a\\b(cX
+No match
+ Xa\\b(cX
+No match
+
+//literal,extended
+Failed: error 192 at offset 0: invalid option bits with PCRE2_LITERAL
+
+/a\b(c/literal,auto_callout,no_start_optimize
+ XXXXa\\b(c
+--->XXXXa\b(c
+ +0 ^ a
+ +0 ^ a
+ +0 ^ a
+ +0 ^ a
+ +0 ^ a
+ +1 ^^ \
+ +2 ^ ^ b
+ +3 ^ ^ (
+ +4 ^ ^ c
+ +5 ^ ^ End of pattern
+ 0: a\b(c
+
+/a\b(c/literal,auto_callout
+ XXXXa\\b(c
+--->XXXXa\b(c
+ +0 ^ a
+ +1 ^^ \
+ +2 ^ ^ b
+ +3 ^ ^ (
+ +4 ^ ^ c
+ +5 ^ ^ End of pattern
+ 0: a\b(c
+
+/(*CR)abc/literal
+ (*CR)abc
+ 0: (*CR)abc
+
+/cat|dog/I,match_word
+Capturing subpattern count = 0
+Max lookbehind = 1
+Extra options: match_word
+Starting code units: c d
+Subject length lower bound = 3
+ the cat sat
+ 0: cat
+\= Expect no match
+ caterpillar
+No match
+ snowcat
+No match
+ syndicate
+No match
+
+/(cat)|dog/I,match_line,literal
+Capturing subpattern count = 0
+Compile options: literal
+Overall options: anchored literal
+Extra options: match_line
+First code unit = '('
+Subject length lower bound = 9
+ (cat)|dog
+ 0: (cat)|dog
+\= Expect no match
+ the cat sat
+No match
+ caterpillar
+No match
+ snowcat
+No match
+ syndicate
+No match
+
+/a whole line/match_line,multiline
+ Rhubarb \na whole line\n custard
+ 0: a whole line
+\= Expect no match
+ Not a whole line
+No match
+
+# Perl gets this wrong, failing to capture 'b' in group 1.
+
+/^(b+|a){1,2}?bc/
+ bbc
+ 0: bbc
+ 1: b
+
+# And again here, for the "babc" subject string.
+
+/^(b*|ba){1,2}?bc/
+ babc
+ 0: babc
+ 1: ba
+ bbabc
+ 0: bbabc
+ 1: ba
+ bababc
+ 0: bababc
+ 1: ba
+\= Expect no match
+ bababbc
+No match
+ babababc
+No match
+
+/[[:digit:]-a]/
+Failed: error 150 at offset 10: invalid range in character class
+
+/[[:digit:]-[:print:]]/
+Failed: error 150 at offset 10: invalid range in character class
+
+/[\d-a]/
+Failed: error 150 at offset 3: invalid range in character class
+
+/[\H-z]/
+Failed: error 150 at offset 3: invalid range in character class
+
+/[\d-[:print:]]/
+Failed: error 150 at offset 3: invalid range in character class
+
+# Perl gets the second of these wrong, giving no match.
+
+"(?<=(a))\1?b"I
+Capturing subpattern count = 1
+Max back reference = 1
+Max lookbehind = 1
+Last code unit = 'b'
+Subject length lower bound = 1
+ ab
+ 0: b
+ 1: a
+ aaab
+ 0: ab
+ 1: a
+
+"(?=(a))\1?b"I
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 1
+ ab
+ 0: ab
+ 1: a
+ aaab
+ 0: ab
+ 1: a
+
+# JIT does not support callout_extra
+
+/(*NO_JIT)(a+)b/auto_callout,no_start_optimize,no_auto_possess
+\= Expect no match
+ aac\=callout_extra
+New match attempt
+--->aac
+ +9 ^ (
++10 ^ a+
++12 ^ ^ )
++13 ^ ^ b
+Backtrack
+--->aac
++12 ^^ )
++13 ^^ b
+Backtrack
+No other matching paths
+New match attempt
+--->aac
+ +9 ^ (
++10 ^ a+
++12 ^^ )
++13 ^^ b
+Backtrack
+No other matching paths
+New match attempt
+--->aac
+ +9 ^ (
++10 ^ a+
+Backtrack
+No other matching paths
+New match attempt
+--->aac
+ +9 ^ (
++10 ^ a+
+No match
+
+/(*NO_JIT)a+(?C'XXX')b/no_start_optimize,no_auto_possess
+\= Expect no match
+ aac\=callout_extra
+New match attempt
+Callout (15): 'XXX'
+--->aac
+ ^ ^ b
+Backtrack
+Callout (15): 'XXX'
+--->aac
+ ^^ b
+Backtrack
+No other matching paths
+New match attempt
+Callout (15): 'XXX'
+--->aac
+ ^^ b
+No match
+
+/\n/firstline
+ xyz\nabc
+ 0: \x0a
+
+/\nabc/firstline
+ xyz\nabc
+ 0: \x0aabc
+
+/\x{0a}abc/firstline,newline=crlf
+\= Expect no match
+ xyz\r\nabc
+No match
+
+/[abc]/firstline
+\= Expect no match
+ \na
+No match
+
+# These tests are matched in test 1 as they are Perl compatible. Here we are
+# looking at what does and does not get auto-possessified.
+
+/(?(DEFINE)(?<optional_a>a?))^(?&optional_a)a$/B
+------------------------------------------------------------------
+ Bra
+ Cond
+ Cond false
+ CBra 1
+ a?
+ Ket
+ Ket
+ ^
+ Recurse
+ a
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?(DEFINE)(?<optional_a>a?)X)^(?&optional_a)a$/B
+------------------------------------------------------------------
+ Bra
+ Cond
+ Cond false
+ CBra 1
+ a?
+ Ket
+ X
+ Ket
+ ^
+ Recurse
+ a
+ $
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(a?)b(?1)a/B
+------------------------------------------------------------------
+ Bra
+ ^
+ CBra 1
+ a?
+ Ket
+ b
+ Recurse
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(a?)+b(?1)a/B
+------------------------------------------------------------------
+ Bra
+ ^
+ SCBra 1
+ a?
+ KetRmax
+ b
+ Recurse
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(a?)++b(?1)a/B
+------------------------------------------------------------------
+ Bra
+ ^
+ SCBraPos 1
+ a?
+ KetRpos
+ b
+ Recurse
+ a
+ Ket
+ End
+------------------------------------------------------------------
+
+/^(a?)+b/B
+------------------------------------------------------------------
+ Bra
+ ^
+ SCBra 1
+ a?
+ KetRmax
+ b
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?=a+)a(a+)++b/B
+------------------------------------------------------------------
+ Bra
+ Assert
+ a++
+ Ket
+ a
+ CBraPos 1
+ a++
+ KetRpos
+ b
+ Ket
+ End
+------------------------------------------------------------------
+
+/(?<=(?=.){4,5}x)/B
+------------------------------------------------------------------
+ Bra
+ AssertB
+ Reverse
+ Assert
+ Any
+ Ket
+ x
+ Ket
+ Ket
+ End
+------------------------------------------------------------------
+
+# Perl behaves differently with these when optimization is turned off
+
+/a(*PRUNE:X)bc|qq/mark,no_start_optimize
+\= Expect no match
+ axy
+No match, mark = X
+
+/a(*THEN:X)bc|qq/mark,no_start_optimize
+\= Expect no match
+ axy
+No match, mark = X
+
+/(?^x-i)AB/
+Failed: error 194 at offset 4: invalid hyphen in option setting
+
+/(?^-i)AB/
+Failed: error 194 at offset 3: invalid hyphen in option setting
+
+/(?x-i-i)/
+Failed: error 194 at offset 5: invalid hyphen in option setting
+
+/(?(?=^))b/I
+Capturing subpattern count = 0
+Last code unit = 'b'
+Subject length lower bound = 1
+ abc
+ 0: b
+
+/(?(?=^)|)b/I
+Capturing subpattern count = 0
+First code unit = 'b'
+Subject length lower bound = 1
+ abc
+ 0: b
+
+/(?(?=^)|^)b/I
+Capturing subpattern count = 0
+Compile options: <none>
+Overall options: anchored
+First code unit = 'b'
+Subject length lower bound = 1
+ bbc
+ 0: b
+\= Expect no match
+ abc
+No match
+
+/(?(1)^|^())/I
+Capturing subpattern count = 1
+Max back reference = 1
+May match empty string
+Compile options: <none>
+Overall options: anchored
+Subject length lower bound = 0
+
+/(?(1)^())b/I
+Capturing subpattern count = 1
+Max back reference = 1
+Last code unit = 'b'
+Subject length lower bound = 1
+
+/(?(1)^())+b/I,aftertext
+Capturing subpattern count = 1
+Max back reference = 1
+Last code unit = 'b'
+Subject length lower bound = 1
+ abc
+ 0: b
+ 0+ c
+
+/(?(1)^()|^)+b/I,aftertext
+Capturing subpattern count = 1
+Max back reference = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'b'
+Subject length lower bound = 1
+ bbc
+ 0: b
+ 0+ bc
+\= Expect no match
+ abc
+No match
+
+/(?(1)^()|^)*b/I,aftertext
+Capturing subpattern count = 1
+Max back reference = 1
+First code unit = 'b'
+Subject length lower bound = 1
+ bbc
+ 0: b
+ 0+ bc
+ abc
+ 0: b
+ 0+ c
+ xbc
+ 0: b
+ 0+ c
+
+/(?(1)^())+b/I,aftertext
+Capturing subpattern count = 1
+Max back reference = 1
+Last code unit = 'b'
+Subject length lower bound = 1
+ abc
+ 0: b
+ 0+ c
+
+/(?(1)^a()|^a)+b/I,aftertext
+Capturing subpattern count = 1
+Max back reference = 1
+Compile options: <none>
+Overall options: anchored
+First code unit = 'a'
+Last code unit = 'b'
+Subject length lower bound = 2
+ abc
+ 0: ab
+ 0+ c
+\= Expect no match
+ bbc
+No match
+
+/(?(1)^|^(a))+b/I,aftertext
+Capturing subpattern count = 1
+Max back reference = 1
+Compile options: <none>
+Overall options: anchored
+Last code unit = 'b'
+Subject length lower bound = 1
+ abc
+ 0: ab
+ 0+ c
+ 1: a
+\= Expect no match
+ bbc
+No match
+
+/(?(1)^a()|^a)*b/I,aftertext
+Capturing subpattern count = 1
+Max back reference = 1
+Last code unit = 'b'
+Subject length lower bound = 1
+ abc
+ 0: ab
+ 0+ c
+ bbc
+ 0: b
+ 0+ bc
+ xbc
+ 0: b
+ 0+ c
+
+# End of testinput2
+Error -70: PCRE2_ERROR_BADDATA (unknown error number)
+Error -62: bad serialized data
+Error -2: partial match
+Error -1: no match
+Error 0: PCRE2_ERROR_BADDATA (unknown error number)
+Error 100: no error
+Error 101: \ at end of pattern
+Error 191: PCRE2_EXTRA_ALLOW_SURROGATE_ESCAPES is not allowed in UTF-16 mode
+Error 200: PCRE2_ERROR_BADDATA (unknown error number)
projects / ossec-hids.git / blobdiff